A LIDAR system is configured to output a system output signal that travels away from the LIDAR system and can be reflected by an object located outside of the LIDAR system. The system output signal includes light from an outgoing LIDAR signal. The LIDAR system has a feedback loop configured to control a frequency versus time pattern of the system output signal. The feedback loop includes an interferometer with a recirculation pathway configured such that a circulated signal travels through the recirculation pathway multiple times before being included in the output of the interferometer. The circulated signal includes light from the outgoing LIDAR signal.
A LIDAR system has multiple comparative waveguides that are each configured to concurrently receive a different comparative signal. The comparative signals include light from a system return signal that has been reflected by an object outside of the LIDAR system. Each of the comparative signals includes light from the same system return signal. The LIDAR system is configured to generate data signals such that each of the data signals is generated from a different one of the comparative signals. The LIDAR system includes a switch configured to receive the data signals. The LIDAR system includes an analog-to-digital converter configured to receive the data signals from the switch.
G01S 7/4915 - Time delay measurement, e.g. operational details for pixel componentsPhase measurement
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
A LIDAR system has multiple comparative waveguides that are each configured to concurrently receive a different comparative signal. The comparative signals include light from a system return signal that has been reflected by an object outside of the LIDAR system. Each of the comparative signals includes light from the same system return signal. The LIDAR system is configured to generate data signals such that each of the data signals is generated from a different one of the comparative signals. The LIDAR system includes a switch configured to receive the data signals. The LIDAR system includes an analog-to-digital converter configured to receive the data signals from the switch.
A LIDAR system concurrently receives multiple different system return signals that have each been reflected by an object located external to the LIDAR system. The LIDAR system has a data signal generator with multiple light sensors that each receives light from a different one of the system return signals. The data signal generator generates data signals that are each an electrical signal beating at a beat frequency. Each of the data signals is generated from the light from a different one of the system return signals. The LIDAR system includes an analog-to-digital converter configured to receive the data signal in series.
A LIDAR system concurrently receives multiple different system return signals that have each been reflected by an object located external to the LIDAR system. The LIDAR system has a data signal generator with multiple light sensors that each receives light from a different one of the system return signals. The data signal generator generates data signals that are each an electrical signal beating at a beat frequency. Each of the data signals is generated from the light from a different one of the system return signals. The LIDAR system includes an analog-to-digital converter configured to receive the data signal in series.
A LIDAR system concurrently outputs multiple LIDAR output signals that concurrently illuminate the same sample region in a field of view for a data period. The sample region is one of multiple sample regions included in the field of view. The LIDAR system also includes electronics that use the multiple LIDAR output signals to generate LIDAR data for the sample region. The LIDAR data includes a distance and/or a radial velocity between the LIDAR system and an object that reflects the LIDAR output signals.
A LIDAR system includes a signal splitter configured to receive an outgoing LIDAR signal. The LIDAR system transmits a system output signal that includes light from the outgoing LIDAR signal received by the splitter. The LIDAR system includes a light signal combiner configured to combine light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate a composite signal beating at a beat frequency. The reference signal includes light from the outgoing LIDAR signal received by the splitter. A length of an optical pathway from the splitter to the light signal combiner is increased such that the time for the reference signal to travel from the splitter to the light signal combiner is greater than 1 picosecond and less than 1 nanosecond.
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
A LIDAR system includes a signal splitter configured to receive an outgoing LIDAR signal. The LIDAR system transmits a system output signal that includes light from the outgoing LIDAR signal received by the splitter. The LIDAR system includes a light signal combiner configured to combine light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate a composite signal beating at a beat frequency. The reference signal includes light from the outgoing LIDAR signal received by the splitter. A length of an optical pathway from the splitter to the light signal combiner is increased such that the time for the reference signal to travel from the splitter to the light signal combiner is greater than 1 picosecond and less than 1 nanosecond.
The LIDAR system has a signal selector configured to receive multiple outgoing LIDAR signals that each carries a different wavelength channel. The LIDAR system includes a selector controller configured to operate the signal selector such that the signal selector serially outputs multiple different selections of the outgoing LIDAR signals. Each of the selections of the system output signals includes multiple different outgoing LIDAR signals that are concurrently output by the signal selector. The LIDAR system is also configured to concurrently transmit multiple system output signals that each includes light from a different one of the outgoing LIDAR signals that have been output from the signal selector.
The LIDAR system has a signal selector configured to receive multiple outgoing LIDAR signals that each carries a different wavelength channel. The LIDAR system includes a selector controller configured to operate the signal selector such that the signal selector serially outputs multiple different selections of the outgoing LIDAR signals. Each of the selections of the system output signals includes multiple different outgoing LIDAR signals that are concurrently output by the signal selector. The LIDAR system is also configured to concurrently transmit multiple system output signals that each includes light from a different one of the outgoing LIDAR signals that have been output from the signal selector.
The LIDAR system includes a light source that outputs an outgoing LIDAR signal. The LIDAR system is configured to transmit a system output signal that includes light from the outgoing LIDAR signal. The LIDAR system includes a light source controller configured to operate the light source such that the outgoing LIDAR signal has a frequency versus time pattern with a control stage and a data stage. The frequency versus time pattern during the data stage has multiple data chirp segments repeated in cycles. The frequency versus time pattern during the control stage has multiple control chirp segments repeated in cycles. Each of the control chirp segments is associated with one of the data chirp segments. A bandwidth of the outgoing LIDAR signal during at least a portion of the control chirp segments each being larger than the bandwidth of the outgoing LIDAR signal during the associated data chirp segment.
G01S 17/26 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/42 - Simultaneous measurement of distance and other coordinates
A LIDAR system includes a utility waveguide that guides an outgoing LIDAR signal precursor. The LIDAR system also includes multiple preliminary alternate waveguides that each guides a preliminary outgoing LIDAR signal that includes light from the outgoing LIDAR signal precursor. The LIDAR system includes amplifiers that are each configured to receive one of the preliminary outgoing LIDAR signals from a different one of the preliminary alternate waveguides. Each of the amplifiers outputs an outgoing LIDAR signal that includes light from one of the preliminary outgoing LIDAR signals. The LIDAR system includes multiple alternate waveguides that each receives one of the outgoing LIDAR signals from a different one of the amplifiers. Electronics operate the amplifiers such that one of the amplifiers serve as an active amplifier and one or more of the amplifiers each serves as inactive amplifier.
The LIDAR system configured output system output signals. Each of the system output signals is output during a different output window. The LIDAR system is configured to receive system return signals that each includes light that is from one of the system output signals and that was reflected by an object located outside of the LIDAR system. The LIDAR system also includes light combiners. Each of the light combiners combines light from the system return signals with light from reference signals so as to generate composite light signals. Each of the composite light signals is beating at a beat frequency. The LIDAR system also includes an Analog-to-Digital Converter that receives data signals that area each beating at the beat frequency of one of the composite signals. The Analog-to-Digital Converter can receive each of the data signals within a different measurement window that is associated with the data signal. Each of the measurement windows overlaps several of the output windows.
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 7/48 - Details of systems according to groups , , of systems according to group
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
The device detection system includes a preliminary LIDAR system configured to concurrently output multiple system output signals and scan the system output signals across a detection space. The preliminary LIDAR system calculates preliminary LIDAR data for multiple different scan zones within the detection space. The preliminary LIDAR data for a scan zone indicates the radial velocity between an object in the scan zone and the one or more LIDAR systems. The preliminary LIDAR system processes the preliminary LIDAR data so as to identify a subject one of the scan zones that contains the object. The device detection system also includes a secondary LIDAR system configured to transmit one or more system output signals and to scan the one or more system output signals across the subject scan zone. The secondary LIDAR system calculates LIDAR data for multiple data regions. The LIDAR data for each data region indicates the radial velocity and/or the distance between the object in the data region and the secondary LIDAR system.
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 17/88 - Lidar systems, specially adapted for specific applications
The device detection system includes a preliminary LIDAR system configured to concurrently output multiple system output signals and scan the system output signals across a detection space. The preliminary LIDAR system calculates preliminary LIDAR data for multiple different scan zones within the detection space. The preliminary LIDAR data for a scan zone indicates the radial velocity between an object in the scan zone and the one or more LIDAR systems. The preliminary LIDAR system processes the preliminary LIDAR data so as to identify a subject one of the scan zones that contains the object. The device detection system also includes a secondary LIDAR system configured to transmit one or more system output signals and to scan the one or more system output signals across the subject scan zone. The secondary LIDAR system calculates LIDAR data for multiple data regions. Each of the data regions at least partially overlaps the subject scan zone. The LIDAR data for each data region indicates the radial velocity and/or the distance between the object in the data region and the secondary LIDAR system.
G01S 7/48 - Details of systems according to groups , , of systems according to group
G01S 7/4915 - Time delay measurement, e.g. operational details for pixel componentsPhase measurement
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 17/933 - Lidar systems, specially adapted for specific applications for anti-collision purposes of aircraft or spacecraft
16.
IDENTIFICATION OF MATERIALS ILLUMINATED BY LIDAR SYSTEMS
The LIDAR system includes a first transform component configured to perform a complex mathematical transform on first signals. The LIDAR system also includes a second transform component configured to perform a real mathematical transform on second signals. Electronics are configured to use an output of the first transform component in combination with an output of the second transformation component to generate LIDAR data.
A LIDAR system has a semiconductor chip with a lateral side between the top side and the bottom side of the semiconductor chip. The lateral side includes a curved portion. The semiconductor chip also includes a slab waveguide with a facet defined by the curved portion of the lateral side of the semiconductor chip. The semiconductor chip is configured to guide outgoing LIDAR signals through the slab waveguide such that the outgoing LIDAR signal exits the slab waveguide through the curved portion of the lateral side.
Systems and methods described herein are directed to polarization separation of incoming light signals associated with an imaging system, such as a Light Detection and Ranging (LIDAR) system. Example embodiments describe a system configured to direct incoming light signals to a polarization separator and capture the two polarization states of the incoming light signals. The system may process the two polarization states of the incoming light signals separately to extract information associated with reflecting objects within the field-of-view of the imaging system. The polarization separator may be a birefringent crystal positioned adjacent to an edge of a photonic integrated circuit (PIC) that is used for processing outgoing and incoming light signals associated with the imaging system. The PIC may include at least one on-chip polarization rotator for converting a light signal of one polarization state to a light signal of another polarization state.
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
G02B 6/28 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
The imaging system includes a LIDAR system with an optical component assembly that concurrently outputs multiple system output signals in a field of view. The system output signals carry the same wavelength channel. The imaging system includes solid-state beam steerers that are each configured to steer one of the system output signals to multiple different pixels within the field of view. The pixels are arranged such that a density of the pixels in the field of view is higher in a concentrated region of the field of view than in a diluted region of the field of view. The optical component assembly is configured such that the location of the concentrated region of the field of view shifts within the field of view in response to a change in a wavelength of the wavelength channel carried by the system output signals.
A LIDAR system includes a utility waveguide that guides an outgoing LIDAR signal precursor. The LIDAR system also includes multiple preliminary alternate waveguides that each guides a preliminary outgoing LIDAR signal that includes light from the outgoing LIDAR signal precursor. The LIDAR system includes amplifiers that are each configured to receive one of the preliminary outgoing LIDAR signals from a different one of the preliminary alternate waveguides. Each of the amplifiers outputs an outgoing LIDAR signal that includes light from one of the preliminary outgoing LIDAR signals. The LIDAR system includes multiple alternate waveguides that each receives one of the outgoing LIDAR signals from a different one of the amplifiers. Electronics operate the amplifiers such that one of the amplifiers serve as an active amplifier and one or more of the amplifiers each serves as inactive amplifier. The outgoing LIDAR signal output from the active amplifier is an active outgoing LIDAR signal and any outgoing LIDAR signal output from one of the inactive amplifiers is an inactive outgoing LIDAR signal. The LIDAR system uses light output from the active outgoing LIDAR signal to calculate LIDAR data but does not use light output from the inactive amplifiers to calculate any LIDAR data. The LIDAR data indicates a distance and/or radial velocity between the LIDAR system and an object.
The imaging system includes a LIDAR system with an optical component assembly that concurrently outputs multiple system output signals in a field of view. The system output signals carry the same wavelength channel. The imaging system includes solid-state beam steerers that are each configured to steer one of the system output signals to multiple different pixels within the field of view. The pixels are arranged such that a density of the pixels in the field of view is higher in a concentrated region of the field of view than in a diluted region of the field of view. The optical component assembly is configured such that the location of the concentrated region of the field of view shifts within the field of view in response to a change in a wavelength of the wavelength channel carried by the system output signals.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02B 6/122 - Basic optical elements, e.g. light-guiding paths
G02B 6/35 - Optical coupling means having switching means
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
22.
IMAGING SYSTEM WITH INCREASED SIGNAL-TO-NOISE RATIO
A LIDAR system outputs a system output signal and receives a system return signal that includes light from the system output signal that was reflected by an object located outside of the LIDAR system. The LIDAR system includes multiple composite signal generators that receive comparative signals. Each of the composite signal generators receives a different one of the comparative signals and each of the comparative signals includes light from the system return signal. Each of the composite signal generators also receive multiple reference signals such that each of the composite signal generators receives a different one of the reference signals. Different composite signal generators receive reference signals having different power levels. The composite signal generators combine the reference signal received by the composite signal generator with the reference signal received by the composite signal generator so as to generate a composite signal.
A LIDAR system includes one or more optical components that output multiple system output signals. The system also includes electronics that use light from the system output signals to generate LIDAR data. The LIDAR data indicates a distance and/or radial velocity between the LIDAR system and one or more object located outside of the LIDAR system. The electronics including a series processing component that processes electrical signals that are each generated from one of the system output signals. The series processing component processes the electrical signals generated from different system output signals in series.
A LIDAR system has a semiconductor chip configured to concurrently output multiple LIDAR output signals. The semiconductor chip includes alternate waveguides. Each of the alternate waveguides carries a different outgoing LIDAR signal. Each of the LIDAR output signals includes light from a different one of the LIDAR output signals. The semiconductor chip includes a reflecting surface that receives incoming LIDAR signals that each includes light from a different one of the LIDAR output signals. The semiconductor chip also includes comparative waveguides. Each of the comparative waveguides receives a comparative signal from the reflecting surface. Each of the comparative signals includes light from a different one of the incoming LIDAR signals.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
A LIDAR system has a semiconductor chip configured to concurrently output multiple LIDAR output signals. The semiconductor chip includes alternate waveguides. Each of the alternate waveguides carries a different outgoing LIDAR signal. Each of the LIDAR output signals includes light from a different one of the LIDAR output signals. The semiconductor chip includes a reflecting surface that receives incoming LIDAR signals that each includes light from a different one of the LIDAR output signals. The semiconductor chip also includes comparative waveguides. Each of the comparative waveguides receives a comparative signal from the reflecting surface. Each of the comparative signals includes light from a different one of the incoming LIDAR signals.
A LIDAR system is configured to scan a system output signal in the field of view of the LIDAR system. The LIDAR system includes a signal director configured to direct an outgoing LIDAR signal to a portion of multiple different waveguides. The system output signal includes light from the outgoing LIDAR signal and the system output signal travels away from the LIDAR system in different directions in response to the outgoing LIDAR signal being directed to a different selection of the waveguides.
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02B 6/10 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
G01S 17/931 - Lidar systems, specially adapted for specific applications for anti-collision purposes of land vehicles
A LIDAR system is configured to scan a system output signal in the field of view of the LIDAR system. The LIDAR system includes a signal director configured to direct an outgoing LIDAR signal to a portion of multiple different waveguides. The system output signal includes light from the outgoing LIDAR signal and the system output signal travels away from the LIDAR system in different directions in response to the outgoing LIDAR signal being directed to a different selection of the waveguides. The LIDAR system includes electronics configured to operate the signal director such that during a first scan of a region of the field of view by the system output signal the outgoing LIDAR signal is directed to a first selection of the waveguides. The electronics are also configured to operate the signal director such that during a second scan of the region of the field of view by the system output signal the outgoing LIDAR signal is directed to a second selection of the waveguides. The second selection of the waveguides has fewer of the waveguide than the first selection of the waveguides.
The LIDAR system outputs a system output signal and receives a system return signal that includes light from the system output signal that was reflected by an object located outside of the LIDAR system. The LIDAR system includes data lines that each carries a different preliminary channel signal. A selection of the preliminary channel signals is beating at a beat frequency. Each of the preliminary channel signals in the selection of the preliminary channel signals is generated from light included in the system return signal. The LIDAR system includes bandpass filter components. Each of the bandpass filter components receives a different one of the preliminary channel signals and outputs a channel signal on a different filtered data line. The channel signal output by each of the bandpass filter components is a representation of the preliminary channel signal received by the bandpass filter component filtered by one or more bandpass filters included in the bandpass filter component.
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 7/4861 - Circuits for detection, sampling, integration or read-out
G01S 17/42 - Simultaneous measurement of distance and other coordinates
The LIDAR system outputs a system output signal and receives a system return signal that includes light from the system output signal that was reflected by an object located outside of the LIDAR system. The LIDAR system includes data lines that each carries a different preliminary channel signal. A selection of the preliminary channel signals is beating at a beat frequency. Each of the preliminary channel signals in the selection of the preliminary channel signals is generated from light included in the system return signal. The LIDAR system includes bandpass filter components. Each of the bandpass filter components receives a different one of the preliminary channel signals and outputs a channel signal on a different filtered data line. The channel signal output by each of the bandpass filter components is a representation of the preliminary channel signal received by the bandpass filter component filtered by one or more bandpass filters included in the bandpass filter component.
G01S 17/00 - Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 7/48 - Details of systems according to groups , , of systems according to group
A LIDAR system transmits a system output signal from the LIDAR system such that a sample region is illuminated by the system output signal. The LIDAR system includes a first light signal combiner configured to combine light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate a composite signal beating at a composite beat frequency. The LIDAR system includes a local light signal combiner configured to combine a first local signal with a second local signal so as to generate a local beating signal beating at a local beat frequency. The reference signal, the system output signal, the first local signal, and the second local signal each includes light from an outgoing LIDAR signal. The LIDAR system also includes electronics that perform a calculation of LIDAR data for the sample region. The LIDAR data for the sample region includes the distance between the LIDAR system and an object in the sample region and/or a radial velocity between the LIDAR system and the object in the sample region. A variable in the calculation is a normalized beat frequency. The normalized beat frequency is the composite beat frequency normalized by a normalizing local beat frequency that is a function of the local beat frequency.
A LIDAR system transmits a system output signal to illuminate a sample region. It includes a first light signal combiner to combine light that returns to the system from the system output signal with light from a reference signal to generate a composite signal beating at a composite beat frequency. It is further configured to combine a first local signal with a second local signal so as to generate a local beatin signal beating at a local beat frequency. The reference signal, the system output signal, the first local signal, and the second local signal each includes light from an outgoing LIDAR signal and includes electronics that perform a calculation of LIDAR data for the sample region that includes the distance between the system and an object in the sample region and/or a radial velocity between the system and the object in the sample region, a variable in the calculation being normalized beat frequency.
G01S 17/00 - Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/08 - Systems determining position data of a target for measuring distance only
G01S 17/42 - Simultaneous measurement of distance and other coordinates
A LIDAR system includes a LIDAR chip configured to output a LIDAR output signal. The LIDAR chip includes a waveguide array. A steering mechanism is configured to control a direction that a system output signal travels away from the LIDAR system. The system output signal includes light from the LIDAR output signal. A location that a comparative signal is incident on the waveguide array changes in response to the steering mechanism changing a direction that the system output signal travels away from the LIDAR system. The comparative signal includes light from the system output signal after the system output signal has been reflected by an object located outside of the LIDAR system.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/06 - Systems determining position data of a target
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 6/35 - Optical coupling means having switching means
09 - Scientific and electric apparatus and instruments
Goods & Services
Machine vision systems comprised of computer hardware, recorded software and optical sensors for detecting, tracking, identifying and classifying objects at ranges of 600 meters or more, used for purposes such as C-UAS (counter-unmanned aircraft system), security, border monitoring and protection, navigation, vehicular applications, geographical surveying, and space travel
35.
IDENTIFICATION OF MATERIALS ILLUMINATED BY LIDAR SYSTEMS
The LIDAR system includes a first transform component configured to perform a complex mathematical transform on first signals. The LIDAR system also includes a second transform component configured to perform a real mathematical transform on second signals. Electronics are configured to use an output of the first transform component in combination with an output of the second transformation component to generate LIDAR data.
A LIDAR system outputs a system output signal that includes light from an outbound LIDAR signal. The LIDAR system includes a chromatic disperser that receives the outbound LIDAR signal and is configured to cause chromatic dispersion of the outbound LIDAR signal. The LIDAR system includes a light source that generates wavelength channel signals that each carries one of multiple different wavelength channels. The outbound LIDAR carries one of the wavelength channels from one of the wavelength channel signals. The light source is operated so as to change the wavelength channel carried by the outbound LIDAR signal. The direction that the outbound LIDAR signal travels away from the chromatic disperser changes in response to the change in the wavelength channel carried by the outbound LIDAR signal. Additionally, the direction that the system output signal travels away from the LIDAR system changes in response to the change in the direction that the outbound LIDAR signal travels away from the chromatic disperser.
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
A LIDAR system outputs a system output signal that includes light from an outbound LIDAR signal. The LIDAR system includes a chromatic disperser that receives the outbound LIDAR signal and is configured to cause chromatic dispersion of the outbound LIDAR signal. The LIDAR system includes a light source that generates wavelength channel signals that each carries one of multiple different wavelength channels. The outbound LIDAR carries one of the wavelength channels from one of the wavelength channel signals. The light source is operated so as to change the wavelength channel carried by the outbound LIDAR signal. The direction that the outbound LIDAR signal travels away from the chromatic disperser changes in response to the change in the wavelength channel carried by the outbound LIDAR signal. Additionally, the direction that the system output signal travels away from the LIDAR system changes in response to the change in the direction that the outbound LIDAR signal travels away from the chromatic disperser.
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G01S 13/10 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves
G01S 13/06 - Systems determining position data of a target
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
A LIDAR system includes a LIDAR chip configured to output a LIDAR output signal. The LIDAR chip includes a waveguide array. A steering mechanism is configured to control a direction that a system output signal travels away from the LIDAR system. The system output signal includes light from the LIDAR output signal. A location that a comparative signal is incident on the waveguide array changes in response to the steering mechanism changing a direction that the system output signal travels away from the LIDAR system. The comparative signal includes light from the system output signal after the system output signal has been reflected by an object located outside of the LIDAR system.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/06 - Systems determining position data of a target
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 6/35 - Optical coupling means having switching means
39.
LIDAR SYSTEM GENERATING MULTIPLE LIDAR OUTPUT SIGNALS
A LIDAR system includes a light source configured to generate an outgoing light signal that includes multiple channels that are each of a different wavelength. The system includes optical components that generate composite light signals. Each composite light signal includes light from a LIDAR input signal combined with light from a reference signal. The LIDAR input signals each includes light that was reflected by an object located apart from the system and that was included also in one of the channels. The reference signals do not include light that was reflected by the object but include light from one of the channels. Each of the composite signals is generated such that the reference signal and the LIDAR input included in the composite signal includes light from the same channel.
Operating the LIDAR system includes transmitting a system output signal from the LIDAR system such that a sample region is illuminated by the system output signal. Different portions of the system output signal are transmitted during different data periods. The method also includes combining light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate beating signals that are each associated with a different one of the data periods. A set of multiple candidate frequencies is generated for each of the data periods. Each of the candidate frequencies for a data period represents a possible beat frequency for the beating signal associated with the data period. The method further includes using the candidate frequencies for a check one of the data periods to identify which of the candidate frequencies for a subject one of the data periods is the beat frequency for the beating signal associated with the subject data period.
Transmitting a system output signal from the LIDAR system such that a sample region is illuminated by the system output signal. Different portions of the system output signal are transmitted during different data periods. Combining light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate beating signals that are each associated with a different one of the data periods. A set of multiple candidate frequencies is generated for each of the data periods. Each of the candidate frequencies for a data period represents a possible beat frequency for the beating signal associated with the data period. Further using the candidate frequencies for a check one of the data periods to identify which of the candidate frequencies for a subject one of the data periods is the beat frequency for the beating signal associated with the subject data period.
Operating a LIDAR system includes transmitting a system output signal from the LIDAR system such that a sample region is illuminated by the system output signal. During illumination of the sample region, the system output signal includes a check data period and multiple subject data periods. A frequency of the system output signal changes at different rates during the subject data periods. Light that returns to the LIDAR system from the system output signal is combined with light from a reference signal so as to generate a beating signal beating at a beat frequency. The reference signal includes light that has not exited from the LIDAR system. A comparative beat frequency is calculated. The comparative beat frequency approximates a value of the beat frequency of the beating signal during the check data period. Additionally, the comparative beat frequency is calculated from the beat frequencies of the beating signal during the subject data periods.
G01S 17/00 - Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
G01S 17/02 - Systems using the reflection of electromagnetic waves other than radio waves
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
A lidar system has a switch configured to direct a switch signal to one of multiple different alternate waveguides such that the alternate waveguide to which the switch directs the switch signal receives the switch signal from the switch. The switch signal carries multiple different channels. The system also includes an optical grating that receive multiple different channel output signals. Each of the channel output signals includes light from the switch signal and carries a different one of the channels. The optical grating outputs the channel output signal such that a direction that each of the channel output signals travels away from the optical grating changes in response to a change in the alternate waveguide to which the switch directs the switch signal.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/02 - Systems using the reflection of electromagnetic waves other than radio waves
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01S 17/93 - Lidar systems, specially adapted for specific applications for anti-collision purposes
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
H04J 14/02 - Wavelength-division multiplex systems
Operating a LIDAR system includes transmitting a system output signal from the LIDAR system such that a sample region is illuminated by the system output signal. During illumination of the sample region, the system output signal includes a check data period and multiple subject data periods. A frequency of the system output signal changes at different rates during the subject data periods. Light that returns to the LIDAR system from the system output signal is combined with light from a reference signal so as to generate a beating signal beating at a beat frequency. The reference signal includes light that has not exited from the LIDAR system. A comparative beat frequency is calculated. The comparative beat frequency approximates a value of the beat frequency of the beating signal during the check data period. Additionally, the comparative beat frequency is calculated from the beat frequencies of the beating signal during the subject data periods.
A LIDAR system has a switch configured to direct a switch signal to one of multiple different alternate waveguides such that the alternate waveguide to which the switch directs the switch signal receives the switch signal from the switch. The switch signal carries multiple different channels. The system also includes an optical grating that receive multiple different channel output signals. Each of the channel output signals includes light from the switch signal and carries a different one of the channels. The optical grating outputs the channel output signal such that a direction that each of the channel output signals travels away from the optical grating changes in response to a change in the alternate waveguide to which the switch directs the switch signal.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
A semiconductor chip has a photonic integrated circuit with a first waveguide and a second waveguide. an optical bridge is positioned over a first one of the faces of the semiconductor chip. The optical bridge is configured to receive a light signal from the first waveguide and the second waveguide is configured to receive the light signal from the optical bridge. The optical bridge holds an optical device and is configured to direct the light signal along a first optical pathway and along a second optical pathway. The first optical pathway, the optical device, and the second optical pathway are arranged such that the light signal received from the first waveguide travels through the optical bridge along the first optical pathway, then through the optical device, and then through the optical bridge along the second optical pathway before being received at the second waveguide.
A LIDAR system includes a signal splitter configured to split a common light signal into a first light signal and a second light signal. The system also includes a signal combiner configured to combine light from the first light signal and light from the second light signal so as to form a combined signal that is beating at a beat frequency. The system also includes electronics that include a beat frequency identifier configured to identify the beat frequency of the combined signal. The electronics also included a chirp rate generator configured to calculate a chirp rate for the common light signal from the beat frequency of the combined signal.
The LIDAR system includes a light source that outputs an outgoing LIDAR signal. The LIDAR system also includes multiple phase differential generators that each combines a first light signal with a second light signal so as to generate a beating control signal. Each of the first light signals and each of the second light signals includes light from the outgoing LIDAR signal. Additionally, the phase differential generators generate each of the beating control signals with a phase difference between the contribution of the first light signal to the beating control signal and the contribution of the second light signal to the beating control signal.
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01S 7/4913 - Circuits for detection, sampling, integration or read-out
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
The LIDAR system includes a light source that outputs an outgoing LIDAR signal. The LIDAR system also includes multiple phase differential generators that each combines a first light signal with a second light signal so as to generate a beating control signal. Each of the first light signals and each of the second light signals includes light from the outgoing LIDAR signal. Additionally, the phase differential generators generate each of the beating control signals with a phase difference between the contribution of the first light signal to the beating control signal and the contribution of the second light signal to the beating control signal. The phase difference is different for the beating control signals from different phase differential generators. Electronics apply a light source control signal to the light source so as to chirp the frequency of the outgoing LIDAR signal. The electronics being configured to modify the light source control signal in response to changes in the frequency of the baseline crossings of the beating control signals.
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
A LIDAR system includes a signal splitter configured to split a common light signal into a first light signal and a second light signal. The system also includes a signal combiner configured to combine light from the first light signal and light from the second light signal so as to form a combined signal that is beating at a beat frequency. The system also includes electronics that include a beat frequency identifier configured to identify the beat frequency of the combined signal. The electronics also included a chirp rate generator configured to calculate a chirp rate for the common light signal from the beat frequency of the combined signal.
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
An optical device has a semiconductor chip with a photonic circuit. The photonic circuit includes a waveguide with a first portion and a second portion. A cross sectional area of the second portion of the waveguide is larger than a cross sectional area of the first portion of the waveguide. The first portion of the waveguide is positioned over a device platform. The waveguide includes a taper that provides a transition between the first portion of the waveguide and the second portion of the waveguide. The taper is an inverted taper that extends below the first portion of the waveguide into the device platform. The second portion of the waveguide terminates at a facet. A recess extends into the chip. The recess has lateral sides. A first one of the lateral sides serving as the facet. A second one of the lateral sides is positioned such that light signals that exit the waveguide through the facet travel across the recess to be received at the second lateral side. The second lateral side is configured to reflect the light signals such that after reflection by the second lateral side the light signals travel away from the second lateral side and toward a location that is above the chip or below the chip.
The imaging system includes one or more cores. Each of the cores outputs a system output signal that illuminates multiple sample regions in a field of view. A subject one of the cores includes a light combiner that generates a composite signal beating at a beat frequency. Electronics use a value of the beat frequency to calculate multiple different possible LIDAR data solutions for a subject one of the sample regions illuminated by the system output signal output from the subject core. Each of the possible LIDAR data solutions includes a comparative component that indicates a value of a radial velocity between the LIDAR system and an object in the subject sample region. The electronics identify a correct one of the LIDAR data solutions by comparing the LIDAR data solutions to data calculated for one or more reference sample regions selected from among the sample regions. The one or more reference sample regions are different from the subject sample region.
G01B 9/02003 - Interferometers characterised by controlling or generating intrinsic radiation properties using two or more frequencies using beat frequencies
G01B 9/02004 - Interferometers characterised by controlling or generating intrinsic radiation properties using two or more frequencies using frequency scans
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
G01S 3/802 - Systems for determining direction or deviation from predetermined direction
G01S 7/4913 - Circuits for detection, sampling, integration or read-out
53.
COMBINING DATA FROM DIFFERENT SAMPLE REGIONS IN AN IMAGING SYSTEM FIELD OF VIEW
The imaging system includes one or more cores. Each of the cores outputs a system output signal that illuminates multiple sample regions in a field of view. A subject one of the cores includes a light combiner that generates a composite signal beating at a beat frequency. Electronics use a value of the beat frequency to calculate multiple different possible LIDAR data solutions for a subject one of the sample regions illuminated by the system output signal output from the subject core. Each of the possible LIDAR data solutions includes a comparative component that indicates a value of a radial velocity between the LIDAR system and an object in the subject sample region. The electronics identify a correct one of the LIDAR data solutions by comparing the LIDAR data solutions to data calculated for one or more reference sample regions selected from among the sample regions. The one or more reference sample regions are different from the subject sample region.
A LIDAR system includes a waveguide array configured to output a LIDAR output signal such that the LIDAR output signal is reflected by an object located off the LIDAR chip. The system also includes electronics configured to tune a wavelength of the LIDAR output signal such that the direction that the LIDAR output signal travels away from the LIDAR chip changes in response to the tuning of the wavelength by the electronics.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
G02F 1/313 - Digital deflection devices in an optical waveguide structure
G01S 3/802 - Systems for determining direction or deviation from predetermined direction
G01S 3/788 - Systems for determining direction or deviation from predetermined direction using rotating reticles producing a direction-dependent modulation characteristic producing a frequency modulation characteristic
55.
IMAGING SYSTEM USING LIGHT SOURCE WITH TUNABLE ELECTRO-OPTICS
The imaging system includes a light source having a laser cavity. A light signal resonates in the laser cavity along an optical path that includes a tunable electro-optic configured to select wavelengths in multiple different wavelength bands. Electronics tune the electro-optic such the selection of wavelengths in the wavelength bands change in response to the tuning. The optical path includes a second optical component configured to select wavelengths in multiple different second wavelength bands. The output of the laser cavity has wavelengths that are common to one of the wavelength bands and one of the second wavelength bands.
A LIDAR system includes a signal director that can direct an outgoing LIDAR signal to any one of multiple different alternate waveguides. Each of the alternate waveguides being associated with a different switch channel in that a light signal that includes light from the outgoing LIDAR signal directed to a particular one of the alternate waveguides can be characterized as carrying the switch channel associated with that alternate waveguide. The LIDAR system is configured to output system output signals that include light from the outgoing LIDAR signals. The system output signals carry different switch channels. The LIDAR system is configured to receive system return signals that each includes light from the system output signals after an object located outside of the system has received and reflected the system output signal. A signal combiner that generates different composite signals by combining light from system return signals that carry different switch channels with a reference signal. Electronics calculate LIDAR data from the frequency of one or more of the composite signals. The LIDAR system being configured to continue to generate a composite signal that carries a first one of the switch channels for a substantial period of time after the imaging system has stopped outputting the system output signal that carries the first switch channel.
A LIDAR system includes a signal director that can direct an outgoing LIDAR signal to any one of multiple different alternate waveguides. Each of the alternate waveguides being associated with a different switch channel in that a light signal that Includes light from the outgoing LIDAR signal directed to a particular one of the alternate waveguides can be characterized as carrying the switch channel associated with that alternate waveguide. The LIDAR system is configured to output system output signals that include light from the outgoing LIDAR signals. The system output signals carry different switch channels. The LIDAR system is configured to receive system return signals that each includes light from the system output signals after an object located outside of the system has received and reflected the system output signal.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/42 - Simultaneous measurement of distance and other coordinates
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G02B 6/35 - Optical coupling means having switching means
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
A LIDAR system is configured to output a system output signal and to receive a system return signal. The system return signal includes light that was included in the system output signal and that was reflected by an object located outside of the LIDAR system. A time delay occurs between the light being output from the LIDAR system and returning to the LIDAR system. The LIDAR system also includes electronics that use a portion of the system return signal that returns to the LIDAR system during a data window to generate LIDAR data that indicates a radial velocity and/or distance between the LIDAR system and the object. The electronics tune the duration of the data window in response to the amount of the time delay.
Systems and methods described herein are directed to polarization separation of incoming light signals associated with an imaging system, such as a Light Detection and Ranging (LIDAR) system. Example embodiments describe a system configured to direct incoming light signals to a polarization separator and capture the two polarization states of the incoming light signals. The system may process the two polarization states of the incoming light signals separately to extract information associated with reflecting objects within the field-of-view of the imaging system. The polarization separator may be a birefringent crystal positioned adjacent to an edge of a photonic integrated circuit (PIC) that is used for processing outgoing and incoming light signals associated with the imaging system. The PIC may include at least one on-chip polarization rotator for converting a light signal of one polarization state to a light signal of another polarization state.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
G02B 6/28 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
A waveguide heater is configured to heat an optical waveguide. The heater includes multiple heating elements and has one or two conditions selected from a group consisting of a first condition and the second condition. The first condition is the heater including multiple interior connectors that are each included in an interior electrical pathway between a pair of the heating elements where the interior connectors are connected in parallel and provide electrical communication between the heating elements included in the pair. The second condition is multiple exterior connectors that are each included in an exterior electrical pathway between electronics and a first one of the heating elements where the exterior connectors are connected in parallel and provide electrical communication between the electronics and the first heating element. The electronics are configured to apply an electrical bias to the heater. In some instances, the heater in included in a wavelength tuner.
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G02B 6/42 - Coupling light guides with opto-electronic elements
The imaging system includes a photonic circuit chip having multiple cores. Each of the cores include an optical switch and multiple alternate waveguides. The optical switch in each core is configured to direct an outgoing light signal to any one of the alternate waveguides, the alternate waveguide to which the outgoing light signal is directed being an active waveguide. Each core outputs the outgoing LIDAR signal from the active waveguide while receiving an incoming LIDAR signal that includes light from the outgoing LIDAR signal, has exited from the imaging system, and has returned to the imaging system. Each core includes a signal splitter that receives the outgoing LIDAR signal and the incoming LIDAR signal.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02B 6/28 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
A waveguide heater is configured to heat an optical waveguide. The heater includes multiple heating elements and has one or two conditions selected from a group consisting of a first condition and the second condition. The first condition is the heater including multiple interior connectors that are each included in an interior electrical pathway between a pair of the heating elements where the interior connectors are connected in parallel and provide electrical communication between the heating elements included in the pair. The second condition is multiple exterior connectors that are each included in an exterior electrical pathway between electronics and a first one of the heating elements where the exterior connectors are connected in parallel and provide electrical communication between the electronics and the first heating element. The electronics are configured to apply an electrical bias to the heater. In some instances, the heater in included in a wavelength tuner.
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 6/42 - Coupling light guides with opto-electronic elements
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
The imaging system is configured to output a system output signal during multiple associated data periods. A pattern of a frequency of the system output signal as a function of time is repeated during each of the associated data periods. The LIDAR system includes a light-combiner that combines light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate beating signals that are each beating at a beat frequency. Each of the beat frequencies is associated with a different one of the data periods. The system also includes electronics that calculate averaged frequencies that are each an average of multiple different beat frequencies and each of the averaged frequencies is associated with a different one of the data periods. The electronics calculate LIDAR data from the average frequencies. The LIDAR data indicates a radial velocity and/or distance between the system and an object outside of the system.
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01N 29/46 - Processing the detected response signal by spectral analysis, e.g. Fourier analysis
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
The imaging system is configured to output a system output signal during multiple associated data periods. A pattern of a frequency of the system output signal as a function of time is repeated during each of the associated data periods. The LIDAR system includes a light-combiner that combines light that returns to the LIDAR system from the system output signal with light from a reference signal so as to generate beating signals that are each beating at a beat frequency. Each of the beat frequencies is associated with a different one of the data periods. The system also includes electronics that calculate averaged frequencies that are each an average of multiple different beat frequencies and each of the averaged frequencies is associated with a different one of the data periods. The electronics calculate LIDAR data from the average frequencies. The LIDAR data indicates a radial velocity and/or distance between the system and an object outside of the system.
An imaging system generates a point cloud such that each point in the point cloud is associated with coordinates, a velocity, and a distance of the point from the imaging system. The system applies one or more velocity criteria to the velocities associated with at least a portion of the points. Additionally, the system flags a portion of a points as valid. The system also flags a second portion of the points as invalid in response to the results of applying the one or more velocity criteria to the velocities. The system performs calculations on the points in the point cloud such that data associated with the points flagged as invalid are excluded from the calculations but the data associated with the points flagged as valid are included in the calculations.
An imaging system has multiple cores that each outputs a system output signal that illuminates multiple sample regions in a field of view for the system. A first portion of the cores are each a range and velocity core and a second portion of the cores are each a velocity core. The system includes electronics that calculate a radial velocity and range for the sample regions illuminated by the range and velocity cores from the beat frequency of a composite signal generated by the range and velocity cores. The electronics also calculate a radial velocity range for the sample regions illuminated by the velocity cores from a beat frequency of a composite signal generated by the velocity cores. The electronics use the ranges calculated for the sample regions illuminated by the range and velocity cores to estimate the ranges for the velocity cores.
The optical system is configured to output a system output signal such that a frequency of the system output signal changes in a series of repeated cycles. Each of the cycles includes multiple data periods. The frequency of the system output signal changes at different rates during different data periods. The optical system includes a light-combining component that combines light that returns to the optical system from the system output signal with light from a reference signal so as to generate a beating signal beating at a beat frequency. The system includes electronics that generate frequency change data that indicates a beat frequency change over time. The electronics can apply edge detection criteria and/or outlier detection criteria to the frequency change data.
G01S 7/48 - Details of systems according to groups , , of systems according to group
G01S 7/4913 - Circuits for detection, sampling, integration or read-out
G01S 7/4915 - Time delay measurement, e.g. operational details for pixel componentsPhase measurement
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
68.
Use of frequency offsets in generation of LIDAR data
A LIDAR system includes a light source that outputs an outgoing LIDAR signal that includes multiple different channels. The LIDAR system also generate multiple composite light signals that each carries a signal couple and are each associated with a different one of the channels. A signal couple includes a reference signal and an associated comparative signal. The comparative signals each include light from the outgoing LIDAR signal that has been reflected by one or more objects located outside of the LIDAR system. The reference signals also include light from the outgoing LIDAR signal but also exclude light that has been reflected by any object located outside of the LIDAR system. There is a frequency differential between a frequency of the reference signal and a frequency of the associated comparative signal. The frequency differential includes a contribution from a frequency offset that is induced by electronics. The electronics induce the frequency offset such that the frequency offset is different for each signal couple.
G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 7/4913 - Circuits for detection, sampling, integration or read-out
69.
Identification of materials illuminated by LIDAR systems
The LIDAR system includes a first transform component configured to perform a complex mathematical transform on first signals. The LIDAR system also includes a second transform component configured to perform a real mathematical transform on second signals. Electronics are configured to use an output of the first transform component in combination with an output of the second transformation component to generate LIDAR data. A signal level ratio obtained by using the first and the second signals is used to identify a material of an object for which the second signals were reflected signals corresponding to the first signals being incident on the object.
The imaging system has a photonic circuit chip that includes multiple cores that each includes a port through which an outgoing optical signal exits the photonic circuit chip. Each of the cores is configured such that the outgoing signal exits the photonic circuit chip traveling toward a location that is above or below the photonic circuit chip. Additionally, each of the cores is configured to combine light from one of the outgoing signals with a reference signal so as to generate a signal beating at a beat frequency. The imaging system also includes electronics that use the beat frequencies from the cores to calculate data that indicates a radial velocity and/or distance between the system and one or more objects located outside of the system.
The imaging system includes a photonic circuit chip having multiple cores. Each of the cores includes an optical switch and multiple alternate waveguides. The optical switch in each core is configured to direct an outgoing light signal to any one of the alternate waveguides, the alternate waveguide to which the outgoing light signal is directed being an active waveguide. Each core outputs the outgoing LIDAR signal from the active waveguide while receiving an incoming LIDAR signal that includes light from the outgoing LIDAR signal, has exited from the imaging system, and has returned to the imaging system. Each core includes a signal splitter that receives the outgoing LIDAR signal and the incoming LIDAR signal. The signal splitter extracts a portion of the outgoing LIDAR signal that serves as a reference signal and at least a portion of the incoming LIDAR signal that serves as a comparative signal. Each core includes a signal combiner that combines light from the reference signal with light from the comparative signal so as to generate a composite signal beating at a beat frequency. Electronics calculate LIDAR data for each core from the beat frequency of the composite signal generated by the core.
The imaging system has a photonic circuit chip that includes multiple cores that each includes a port through which an outgoing optical signal exits the photonic circuit chip. Each of the cores is configured such that the outgoing signal exits the photonic circuit chip traveling toward a location that is above or below the photonic circuit chip. Additionally, each of the cores is configured to combine light from one of the outgoing signals with a reference signal so as to generate a signal beating at a beat frequency. The imaging system also includes electronics that use the beat frequencies from the cores to calculate data that indicates a radial velocity and/or distance between the system and one or more objects located outside of the system.
The LIDAR system includes a first transform component configured to perform a complex mathematical transform on first signals. The LIDAR system also includes a second transform component configured to perform a real mathematical transform on second signals. Electronics are configured to use an output of the first transform component in combination with an output of the second transformation component to generate LIDAR data. The electronics are further configured to use a peak in the output of the first transform component to identify the peak in the output of the second transform component that is located at the beat frequency of the second signals.
A LIDAR system outputs a system output signal such that the system output signal can be reflected by an object located outside of the LIDAR system. The system also receives a system return signal that includes light from the reflected LIDAR output signal. The system return signal and the system output signal each carries a first channel. The LIDAR system combine light that is from the system return signal and that carries the first channel with a reference signal so as to produce a composite signal beating at a beat frequency. Electronics operate the LIDAR system such that the first channel has a series of chirp cycles.
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
G01S 3/788 - Systems for determining direction or deviation from predetermined direction using rotating reticles producing a direction-dependent modulation characteristic producing a frequency modulation characteristic
A LIDAR system includes a LIDAR chip with a utility waveguide configured to guide an outgoing LIDAR signal and an incoming LIDAR signal. The incoming LIDAR signal includes light from the LIDAR output signal after an object located outside of the LIDAR system reflects the light from the LIDAR output signal. The LIDAR chip also includes a polarizing-beam splitter configured to receive the outgoing LIDAR signal and the incoming LIDAR signal and to separate the incoming LIDAR signal from the outgoing LIDAR signal.
Systems and methods described herein are directed to high speed remote imaging systems, such as Light Detection and Ranging (LIDAR) systems. Example embodiments describe systems that are configured to mitigate a walk-off effect that may limit a speed of operation of the imaging system. The walk-off effect may be characterized by a failure to steer returning signals to a designated input facet of the imaging system due to continuous rotation of mirrors associated with the steering mechanisms. The walk-off effect may be mitigating by configuring more than one input waveguide to receiving returning signals associated with an output signal. The input waveguides may be spaced apart and configured to sequentially receive the input signals. In some embodiments, walk-off mitigation may extend a range of operation of the imaging systems.
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/26 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals
A LIDAR system includes a LIDAR chip with a utility waveguide configured to guide an outgoing LIDAR signal and an incoming LIDAR signal. The incoming LIDAR signal includes light from the LIDAR output signal after an object located outside of the LIDAR system reflects the light from the LIDAR output signal. The LIDAR chip also includes a polarizing-beam splitter configured to receive the outgoing LIDAR signal and the incoming LIDAR signal and to separate the incoming LIDAR signal from the outgoing LIDAR signal.
A LIDAR system outputs a system output signal such that the system output signal can be reflected by an object located outside of the LIDAR system. The system also receives a system return signal that includes light from the reflected LIDAR output signal. The system return signal and the system output signal each carries a first channel. The LIDAR system combine light that is from the system return signal and that carries the first channel with a reference signal so as to produce a composite signal beating at a beat frequency. Electronics operate the LIDAR system such that the first channel has a series of chirp cycles. Each chirp cycle includes a linear chirp section where a frequency chirp of the channel is linear. Multiple different sample periods fall within each of the linear chirp sections. The electronics calculate LIDAR data for each of the sample periods from the beat frequency of the composite signal during the sample period. The LIDAR data for a sample period indicates the radial velocity and/or distance between the LIDAR system and the object.
A LIDAR system has a beam steerer and a signal director that are each configured to steer within a field of view a system output signal that is output from the LIDAR system. A path of system output signal in the field of view has a contribution from the beam steerer and the signal director. The contribution of the beam steerer to the path is movement of the system output signal on a two-dimensional path back and forth across the field of view. The contribution of the signal director to the path is movement of the system output signal transverse to the two-dimensional path contribution of the provided by the beam steerer.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/42 - Simultaneous measurement of distance and other coordinates
G02B 6/10 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
A LIDAR system has a beam steering mechanism and a signal steering mechanism that are each configured to steer within a field of view a system output signal that is output from the LIDAR system. A path of system output signal in the field of view has a contribution from the beam steering mechanism and the second mechanism. The contribution of the beam steering mechanism to the path is movement of the system output signal on a two-dimensional path back and forth across the field of view. The contribution of the signal steering mechanism to the path is movement of the system output signal transverse to the two-dimensional path contribution of the provided by the beam steering mechanism.
A LIDAR system includes a light source configured to output a source signal. The LIDAR chip is also configured to output a LIDAR output signal that exits from the LIDAR chip. The LIDAR system also includes an isolator adapter that includes an optical isolator configured to receive an adapter signal. The adapter signal includes light that is from the source signal and that has exited from the LIDAR chip before being received by the optical isolator. The isolator is configured to output light from the adapter signal in an isolator output signal. Additionally, the LIDAR output signal includes light from the isolator output signal.
G02F 1/025 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction in an optical waveguide structure
G02B 6/13 - Integrated optical circuits characterised by the manufacturing method
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
A LIDAR system includes a light source configured to output a source signal. The LIDAR chip is also configured to output a LIDAR output signal that exits from the LIDAR chip. The LIDAR system also includes an isolator adapter that includes an optical isolator configured to receive an adapter signal. The adapter signal includes light that is from the source signal and that has exited from the LIDAR chip before being received by the optical isolator. The isolator is configured to output light from the adapter signal in an isolator output signal. Additionally, the LIDAR output signal includes light from the isolator output signal.
G02B 6/122 - Basic optical elements, e.g. light-guiding paths
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
83.
On-chip optical switch based on an echelle grating
An on-chip optical switch based on an echelle grating and a phase tuning element is described herein. The phase tuning element may change a refractive index of the material through which an optical signal propagates, thereby causing a change in the angle of propagation of the optical signal. By dynamically tuning the phase change element, the refractive index change may be controlled such that the deviation of the optical signal causes the optical signal to be focused on a particular coupling waveguide out of an array of coupling waveguides. The echelle grating with the active phase change element form a configurable optical switch capable of switching an optical signal between two or more coupling waveguides, that may be respectively connected to different optical signal processing pathways.
A LIDAR system has a switch configured to direct a switch signal to one of multiple different alternate waveguides. The switch signal carries multiple different channels. The system also includes one more redirection components that receive multiple different channel output signals. Each of the channel output signals carries a different one of the channels. The one more redirection components are configured to redirect the channel output signals such that a direction that each of the channel output signals travels away from the one more redirection components changes in response to a change in the alternate waveguide which receives the switch signal.
A LIDAR system has a switch configured to direct a switch signal to one of multiple different alternate waveguides. The switch signal carries multiple different channels. The system also includes one more redirection components that receive multiple different channel output signals. Each of the channel output signals carries a different one of the channels. The one more redirection components are configured to redirect the channel output signals such that a direction that each of the channel output signals travels away from the one more redirection components changes in response to a change in the alternate waveguide which receives the switch signal.
A LIDAR system has one or more light splitters and multiple light combiners. The LIDAR system also has multiple optical pathways through which light signals travel. The optical pathways include delay pathways that each extends from one of the one or more splitters to one of the light combiners. The optical pathways include expedited pathways that each extends from one of the splitters to one of the light combiners. Each of the light combiners has one of the delay pathways and one of the expedited pathways extending to the light combiner. The delay pathways and the expedited pathways are configured such that the delay pathway to each light combiner is longer than the expedited pathway to the same light combiner.
A LIDAR system has one or more light splitters and multiple light combiners. The LIDAR system also has multiple optical pathways through which light signals travel. The optical pathways include delay pathways that each extends from one of the one or more splitters to one of the light combiners. The optical pathways include expedited pathways that each extends from one of the splitters to one of the light combiners. Each of the light combiners has one of the delay pathways and one of the expedited pathways extending to the light combiner. The delay pathways and the expedited pathways are configured such that the delay pathway to each light combiner is longer than the expedited pathway to the same light combiner. Each of the delay pathways has a common portion and a separated portion. The common portion of each delay pathway is shared by the other delay pathways. In contrast, the separated portion of a delay pathways is not shared with the other delay pathways.
An optical system has a LIDAR chip that includes a switch configured to direct an outgoing LIDAR signal to one of multiple different alternate waveguides. The system also includes a redirection component configured to receive the outgoing LIDAR signal from any one of the alternate waveguides. The redirection component is also configured to redirect the received outgoing LIDAR signal such that a direction that the outgoing LIDAR signal travels away from the redirection component changes in response to changes in the alternate waveguide to which the optical switch directs the outgoing LIDAR signal.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
A LIDAR system is configured to perform a field scan where multiple sample regions in a field of view are sequentially illuminated by a system output signal. The LIDAR system includes electronics that use light from the system output signal to generate LIDAR data results for the sample regions. Each of the LIDAR data results indicates a radial velocity and/or a separation distance between the LIDAR system and an object located outside of the LIDAR system and in the sample region illuminated by the system output signal. The electronics are also configured to adjust the LIDAR data results for a subject one of the sample regions. The adjustment to the LIDAR data result for the subject sample region is made in response to the LIDAR data result for the subject sample having an edge effect error. The edge effect error is an inaccuracy that results from the system output signal illuminating an edge of the object during the illumination of the subject sample region by the system output signal.
A LIDAR system has a circulator outputs multiple different outgoing circulator signals. The circulator receives multiple different circulator return signals. Each of the circulator return signals includes light that was included in one of the outgoing circulator signals and was reflected by one or more objects located outside of the LIDAR system. The circulator is configured to output multiple circulator output signals that each includes light from one of the circulator return signals. The LIDAR system also includes electronics that use the circulator output signals to generate one or more LIDAR data results. The LIDAR data results are selected from a group consisting of a distance and a radial velocity between the LIDAR system and the one or more objects.
A LIDAR system has a circulator outputs multiple different outgoing circulator signals. The circulator receives multiple different circulator return signals. Each of the circulator return signals includes light that was included in one of the outgoing circulator signals and was reflected by one or more objects located outside of the LIDAR system. The circulator is configured to output multiple circulator output signals that each includes light from one of the circulator return signals. The LIDAR system also includes electronics that use the circulator output signals to generate one or more LIDAR data results. The LIDAR data results are selected from a group consisting of a distance and a radial velocity between the LIDAR system and the one or more objects.
The LIDAR system is encodes a system output signal with a binary code. Additionally, the LIDAR system identifies an amount of time between the binary code being transmitted from the LIDAR system and returning to the LIDAR system after being reflected by an object located outside of the LIDAR system.
An on-chip optical switch based on an echelle grating and a phase tuning element is described herein. The phase tuning element may change a refractive index of the material through which an optical signal propagates, thereby causing a change in the angle of propagation of the optical signal. By dynamically tuning the phase change element, the refractive index change may be controlled such that the deviation of the optical signal causes the optical signal to be focused on a particular coupling waveguide out of an array of coupling waveguides. The echelle grating with the active phase change element form a configurable optical switch capable of switching an optical signal between two or more coupling waveguides, that may be respectively connected to different optical signal processing pathways.
The LIDAR system is encodes a system output signal with a binary code. Additionally, the LIDAR system identifies an amount of time between the binary code being transmitted from the LIDAR system and returning to the LIDAR system after being reflected by an object located outside of the LIDAR system.
An on-chip polarizer for polarization filtering is described herein. The polarizer includes a rib waveguide on a supporting substrate, wherein the rib waveguide and the substrate may respectively comprise different materials. The rib waveguide may include a strip positioned over a slab of the same material. The strip may include a curvature along an optical propagation direction. In some embodiments, the curvature may include two bends that together form an approximately mirrored S-shaped curvature. The waveguide curvature may be configured to selectively guide an optical mode associated with a first polarization state while filtering-out another optical mode associated with a second polarization state. In some embodiments, the polarizer may allow propagation of a near lossless transverse magnetic (TM) mode while selectively radiating away a lossy transverse electric (TE) mode.
G02B 6/126 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind using polarisation effects
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G02B 6/122 - Basic optical elements, e.g. light-guiding paths
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
96.
INCREASING SIGNAL-TO-NOISE RATIOS IN LIDAR SYSTEMS
A LIDAR system includes a light source configured to output light. A portion of the light is included in a LIDAR signal that travels a LIDAR path from the light source to an object located outside of the LIDAR system and from the object to a filter and from the filter to a processing unit. The processing unit is configured to convert optical signals that include the LIDAR signal to electrical signals. A portion of the light is also included in one or more misdirected signals. Each of the misdirected signals travels a different misdirected path from the light source to the filter. Each of the misdirected paths is a different path from the LIDAR path. The system also includes a filter being configured to filter out the LIDAR signal from the misdirected signals. The system also includes electronics that generate LIDAR data from the electrical signals.
Systems and methods described herein are directed to optical light sources, such as an external cavity laser (ECL) with an active phase shifter. The system may include control circuity for controlling one or more parameters associated with the active phase shifter. The phase shifter may be a p-i-n phase shifter. The control circuitry may cause variation in a refractive index associated with the phase shifter, thereby varying a lasing frequency of the ECL. The ECL may be configured to operate as a light source for a light detection and ranging (LIDAR) system based on generating frequency modulated light signals. In some embodiments, the ECL may generate an output LIDAR signal with alternating segments of increasing and decreasing chirp frequencies. The ECL may exhibit increased stability and improved chirp linearities with less dependence on ambient temperature fluctuations.
A LIDAR system includes a light source configured to output light. A portion of the light is included in a LIDAR signal that travels a LIDAR path from the light source to an object located outside of the LIDAR system and from the object to a filter and from the filter to a processing unit. The processing unit is configured to convert optical signals that include the LIDAR signal to electrical signals. A portion of the light is also included in one or more misdirected signals. Each of the misdirected signals travels a different misdirected path from the light source to the filter. Each of the misdirected paths is a different path from the LIDAR path. The system also includes a filter being configured to filter out the LIDAR signal from the misdirected signals. The system also includes electronics that generate LIDAR data from the electrical signals.
Systems and methods described herein are directed to polarization separation of laser signals and/or incoming light signals associated with an imaging system, such as a Light Detection and Ranging (LIDAR) system. Example embodiments describe a system configured to direct incoming light signals to a polarization separator and capturing the two polarization states of the incoming light signals. In some instances, the laser signal may be converted into two different polarization states. The system may individually process the two polarization states of the incoming light signals along with the corresponding polarization state of the laser reference signal to extract information associated with reflecting objects within the field-of-view of the imaging system. The polarization separator may be a birefringent crystal positioned adjacent to an edge of a photonic integrated circuit (PIC) that is used for processing outgoing and incoming light signals associated with the imaging system.
G01S 17/00 - Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
G01S 17/88 - Lidar systems, specially adapted for specific applications
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
Systems and methods described herein are directed to polarization separation of laser signals and/or incoming light signals associated with an imaging system, such as a Light Detection and Ranging (LIDAR) system. Example embodiments describe a system configured to direct incoming light signals to a polarization separator and capturing the two polarization states of the incoming light signals. In some instances, the laser signal may be converted into two different polarization states. The system may individually process the two polarization states of the incoming light signals along with the corresponding polarization state of the laser reference signal to extract information associated with reflecting objects within the field-of-view of the imaging system. The polarization separator may be a birefringent crystal positioned adjacent to an edge of a photonic integrated circuit (PIC) that is used for processing outgoing and incoming light signals associated with the imaging system.
G01S 17/32 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects
G02B 6/28 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
