Abstract

A plasmonic waveguide (10), a biosensor chip (100) and a system, wherein the plasmonic waveguide (10) is applied to the biosensor chip (100), and comprises a base (11) and a plasmonic structure (12) provided on the upper surface of the base (11); the plasmonic structure (12) comprises a plurality of plasmons (121) periodically arranged, the plasmons (121) being metal split rings, and the annular openings of the plasmons (121) being used for fixing antibody probes (122). The plasmon waveguide (10) is provided in the biosensor chip (100), the target biomolecules in the detection liquid flowing into a microfluidic channel (31) can be captured by means of the antibody probes (122), and the plasmonic waveguide (10) is used to enhance the signal strength of terahertz waves emitted to the biosensor chip (100), thereby enhancing the signal strength of the reflected terahertz waves detected by a terahertz analyzer (300), improving the detection sensitivity, the signal-to-noise ratio and the reliability.

IPC Classes  ?

• G01N 21/3577 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
• G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation
• G01N 21/552 - Attenuated total reflection
• G01N 33/53 - Immunoassay; Biospecific binding assay; Materials therefor

Abstract

A spectrometer (100) and a controller (5) thereof are applicable to the technical field of spectrometers. The controller (5) is applied in the spectrometer (100), and comprises the following integrally joined components: a processor (51), a light source driving circuit (52), a data processing circuit (53) and a display screen driving circuit (54). The spectrometer has a compact structure, and a touch command can be input via a touch display screen (6). The spectrometer employs the controller (5) to control a light source (2), a spectrum detector (4) and the touch display screen (6) according to the touch command so as to detect spectrum data of a sample (200), thereby achieving a high degree of intelligence.

IPC Classes  ?

• G01N 21/64 - Fluorescence; Phosphorescence

Abstract

A spectrometer (100) and a spectral detection system, the spectrometer (100) comprising a main shell (101) and a sample frame (1), a light source (2), a light receiver (3), a spectral detector (4), a controller (5), and a touch control display screen (6) integrated in the main shell (101), the spectrometer (100) having a high degree of integration and a compact structure; touch control commands can be inputted by means of the touch control display screen (6), the controller (5) controlling the light source (2), the spectral detector (4), and the touch control display screen (6) on the basis of the touch control commands, and thereby implementing spectral data detection of a sample (200), having a high degree of smartness.

IPC Classes  ?

• G01N 21/64 - Fluorescence; Phosphorescence

Abstract

A terahertz spectrum test device and system includes a femtosecond fiber laser configured to generate a pump light and a probe light. The pump light excites a terahertz transmitter to generate terahertz waves which are transmitted to a sample suspension device to irradiate a suspended to-be-tested sample, and the probe light is directly transmitted to a terahertz detector. The terahertz detector receives the terahertz waves transmitted from the sample suspension device, and then transmits the terahertz waves and the probe light together to a signal processing circuit to obtain a corresponding terahertz time-domain spectrum. By adoption of the terahertz spectrum test device and system, the to-be-tested sample need not be fixed with a clamp or other instruments, so that terahertz waves will not irradiate to the instrument used for fixing the to-be-tested sample during a terahertz spectrum test, which may otherwise affect the test result.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
• G01N 21/39 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers

Abstract

A quantum yield measurement method. By means of placing a material to be detected inside an integration sphere (60), first acquiring an excitation spectrum of excitation light (S10); then, emitting excitation light onto the material to be detected, acquiring a photoluminescence spectrum and an excitation light transmitted spectrum of the material to be detected (S20); according to the excitation spectrum, photoluminescence spectrum and transmitted spectrum, generating a quantum yield of the material to be detected (S30). Thus, it is not necessary to remove the material to be detected when probing an excitation spectrum, a photoluminescence spectrum and a transmitted spectrum, ensuring that measurement data is all obtained in an identical environment, preventing errors caused by different measurement environments, and solving the problem in conventional methods of measuring quantum yield of differences in measurement conditions when probing excitation spectrum and excitation light transmitted spectrum, leading to certain errors in quantum yield measurement.

IPC Classes  ?

• G01N 21/63 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited

Abstract

An optical path control device, comprising at least two light reflection mechanisms (11) and one optical path compensation mechanism (12), wherein the light reflection mechanisms comprise light entry mirrors (111) and light exit mirrors (112), the light entry mirrors (111) are used to reflect light traveling along a first direction to the light exit mirrors (112), the light exit mirrors (112) are used to reflect the light reflected by the light entry mirrors (111) outward along a second direction, and the first direction is arranged opposite to the second direction; and the optical path compensation mechanism (12) is used to drive the light reflection mechanisms (11) to reciprocate together along the first direction or the second direction. The present optical path control device employs at least two light reflection mechanisms (11) to reflect light, expands the effective adjustment range of an optical path, and drives the at least two light reflection mechanisms (11) by means of the optical path compensation mechanism (12) to reciprocate together along the first direction or the second direction so as to control the optical path of a compensation light path, so that the structure is compact and the occupied space thereof is reduced. The present invention is suitable for miniaturized and portable terahertz time-domain spectrometers.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
• G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements

Abstract

A terahertz time-domain spectrometer, comprising a spectrometer main body (11), a sample carrying structure (12) and a scanning driving device (13). The spectrometer main body (11) comprises a terahertz generator (111) and a mounting and matching structure (112). The mounting and matching structure (112) is detachably connected to a reflection imaging device (20)/transmission spectrum testing device. The sample carrying structure (12) has a scanning operation position and a scanning standby position. The scanning driving device (13) is used to drive the sample carrying structure (12) to reciprocate between the scanning operation position and the scanning standby position, and is used to drive the sample carrying structure (12) to perform a scanning action when the sample carrying structure (12) is in the scanning operation position. The present terahertz time-domain spectrometer does not need to frequently disassemble and debug the scanning, imaging and testing devices to change the testing mode. The testing device may be replaced quickly and easily, and the change does not require optical alignment, which may meet the diverse testing needs of users.

IPC Classes  ?

• G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details
• G01J 3/28 - Investigating the spectrum
• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

Disclosed is an imaging adjustment device (100). The imaging adjustment device (100) comprises: a scanning driving mechanism (10), an adjustment mechanism (50) connected to the scanning driving mechanism (10), and an imaging platform (90) connected to the adjustment mechanism (50), wherein the scanning driving mechanism (10) comprises a mounting frame (20), a first telescopic assembly (30) connected to the mounting frame (20), and a second telescopic assembly (40) connected to the first telescopic assembly (30); the adjustment mechanism (50) comprises a stand base (60) connected to the second telescopic assembly (40), a vertical adjustment assembly (70) connected to the stand base (60), and a horizontal adjustment assembly (80) connected to the vertical adjustment assembly (70); and the imaging platform (90) is connected to the horizontal adjustment assembly (80). According to the imaging adjustment device (100), the adjustment of the imaging platform (90) in a vertical direction and the adjustment of the levelness are realized by means of providing the vertical adjustment assembly (70) and the horizontal adjustment assembly (80); and a focusing operation can be realized by means of the vertical adjustment assembly (70), and the adjustment of the levelness of a sample can be realized by means of the horizontal adjustment assembly (80), so as to reduce the deviation of the imaging platform (90) during machining and sample mounting, thereby improving the precision of sample information collection.

IPC Classes  ?

• G05D 3/10 - Control of position or direction without using feedback

Abstract

A dynamic signal transmission structure based on a hybrid beamforming technology includes a radio-frequency module and an antenna array connected therewith. The radio-frequency module includes one or more radio-frequency link units connected in parallel, the antenna array includes one or more antenna sub-arrays, and each antenna sub-array is connected with one of the radio-frequency modules. The hybrid beamforming technology includes analog and digital beamforming. In this structure, the analog beamforming parameters and the digital beamforming parameters are constant, and the number of radio-frequency link units in the radio-frequency module, the number of antenna sub-arrays in the antenna array, the analog beamforming parameters, and the digital beamforming parameters are in a quantitative relation. The structure of the antenna array and the number of radio-frequency link units in each radio-frequency module can be adjusted dynamically under the condition where the performance is guaranteed, and accordingly, the hardware complexity is reduced.

IPC Classes  ?

• H04B 7/06 - Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Abstract

Disclosed are an optical coherence tomography imaging apparatus based on a digital micro-mirror device and an optical coherence tomography method based on a digital micro-mirror device and using the optical coherence tomography imaging apparatus. The imaging apparatus comprises a broadband light source (1), an optical fiber coupler (3), a reference arm (4), a sample arm, a micro-mirror controller (12), a detector (2), and a computer (11). The optical fiber coupler (3) is used for receiving light emitted by the broadband light source (1) and dividing the light into reference light and sample light, wherein the sample arm comprises a digital micro-mirror device (8) for reflecting the sample light, the digital micro-mirror device (8) is provided with millions of micro reflection mirrors (6), and three-dimensional information of a sample (10) can be obtained after same is scanned by all the reflection mirrors (6). The imaging apparatus is controlled by pure digital signals of the digital micro-mirror device, the scanning error generated by using an optical scanning head is avoided, and the stability and the accuracy of sample scanning-based imaging result are improved. The method utilizing the imaging apparatus is simply controlled and easily operated, and has a high sample imaging efficiency.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01B 9/02 - Interferometers

Abstract

The present invention relates to a metamaterial structure and a metamaterial microwave resonator manufactured by using same. The metamaterial structure comprises: a dielectric layer; a first metal coating, wherein the first metal coating covers the dielectric layer, and comprises a first arc-shaped metal coating and a first strip-shaped metal coating, and the first strip-shaped metal coating intersects with the first arc-shaped metal coating; and a second metal coating, wherein the second metal coating and the first metal coating have the same structure and are symmetrically arranged, the second metal coating covers the dielectric layer, and comprises a second arc-shaped metal coating and a second strip-shaped metal coating, the second strip-shaped metal coating intersects with the second arc-shaped metal coating, the opening of the second arc-shaped metal coating is opposite to that of the first arc-shaped metal coating, the end parts of the openings are arranged at an interval, the second strip-shaped metal coating and the first strip-shaped metal coating have the same extension direction, and the end parts are arranged at an interval. The microwave resonator manufactured by using the metamaterial structure has a high Q value, and has less difficulty in a manufacturing process.

IPC Classes  ?

• H01Q 15/00 - Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
• H01P 7/08 - Strip line resonators

Abstract

Disclosed are a signal conversion device (100) for a terahertz radar, and a terahertz radar, wherein the signal conversion device (100) for a terahertz radar comprises an optical signal conversion unit (110) and a microwave signal conversion unit (120), with the optical signal conversion unit (110) comprising an optical reference signal source (111), a microwave signal generation module (112), a first optical modulation module (113), a first optical filter module (114), a first optical true time delay module (115) and a first photoelectric conversion module (116) connected in series in sequence; and the microwave signal conversion unit (120) comprises a second photoelectric conversion module (121), a second optical modulation module (122), a second optical true time delay module (123), a second optical filter module (124) and an analog-to-digital conversion module (125) connected in series in sequence. According to the signal conversion device (100) for a terahertz radar, a processing problem of an ultra-wideband microwave signal is converted into a processing problem of a narrow-band photon in an optical threshold by means of combining microwave technology with photon technology, thereby breaking the bottleneck that conventional electronics technology cannot break and effectively improving the function and performance of a radar.

IPC Classes  ?

• G01S 13/04 - Systems determining presence of a target

Abstract

Provided by the present invention are a jade identification method, device and system, and a storage medium. The method comprises: acquiring a first terahertz time domain spectrum of a reference sample and a second terahertz time domain spectrum of a jade sample by using a terahertz time domain spectroscopy device having a reflective terahertz optical path; performing Fourier transform on the first terahertz time domain spectrum and the second terahertz time domain spectrum respectively to acquire a first terahertz frequency domain spectrum of the reference sample and a second terahertz frequency domain spectrum of the jade sample; calculating an absorption coefficient spectrum of the jade sample or a refractive index spectrum of the jade sample according to the first terahertz frequency domain spectrum and the second terahertz frequency domain spectrum; and determining the authenticity of the jade sample according to the absorption coefficient spectrum or the refractive index spectrum. By employing the present method, jade samples may be identified without damaging the quality thereof, and the calculation and analysis processes are simple.

IPC Classes  ?

• G01N 21/25 - Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• G01N 21/39 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers

Abstract

A terahertz oscillation circuit and oscillator based on a resonant tunneling diode, the terahertz oscillation circuit comprising: a first resistor, a first capacitor, a first inductance and a resonant tunneling diode for providing negative resistance, the first resistor being used to provide a bypass shunt, the first capacitor being used to filter parasitic low frequency oscillation signals generated by parasitic resistance and parasitic capacitance in the terahertz oscillation circuit, and the resonant tunneling diode being enabled to work in a negative resistance region by adding a working bias voltage at both ends of the resonant tunneling diode so that the terahertz oscillation circuit continuously oscillates to produce an oscillating signal and drive a load to radiate the oscillating signal outwards, thereby realizing the generation of terahertz radiation while operating at room temperature, and having the characteristics of low power consumption and high stability, which solves the problem of existing terahertz radiation sources needing low-temperature cooling during use due to the large volume thereof and having a relatively short device life, which greatly limits the development and application range of terahertz radiation sources.

IPC Classes  ?

• H04B 1/16 - Circuits
• H01L 29/88 - Tunnel-effect diodes

Abstract

A method for detecting the authenticity of Cordyceps sinensis based on an electromagnetic wave in a terahertz band, comprising: detecting an absorption spectrum of a reference product for an electromagnetic wave in a terahertz band, the absorption spectrum of the reference product being a fingerprint spectrum; detecting an absorption spectrum of a sample to be detected for the electromagnetic wave in the terahertz band, the absorption spectrum of the sample to be detected being a sample spectrum; and comparing the sample spectrum with the fingerprint spectrum to obtain the comparison result, so as to determine, according to the comparison result, whether the sample to be detected is an authentic Cordyceps sinensis product.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

The present invention relates to a method for detecting melamine, comprising: mixing a melamine standard with water to formulate a plurality of melamine solutions of different concentrations; extracting melamine in the milk to be detected, and achieving a constant volume with water to obtain a solution to be detected; obtaining Terahertz absorption spectrums of a plurality of melamine solutions of different concentrations; determining the absorption peak and the absorption peak area of the melamine standard to establish a functional relationship between the concentration of the melamine solution and the absorption peak area; obtaining Terahertz absorption spectrums of the solution to be detected, and comparing same with the absorption spectrums of the melamine standard to determine the absorption peak and the absorption peak area of the melamine in the solution to be detected; and calculating the concentration of the melamine in the milk to be detected according to the absorption peak area of the melamine in the solution to be detected, and the functional relationship between the concentration of the melamine solution and the absorption peak area. Said method for detecting melamine can detect melamine in an aqueous solution by using Terahertz spectrum, and the detection is quick and accurate.

IPC Classes  ?

• G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation
• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

A millimeter wave imaging apparatus, including: a crystal oscillator, a power divider, a millimeter wave transceiver, a local-oscillation signal processor, a second frequency mixer and an image processor; the power divider performs power distribution on an oscillation signal generated by the crystal oscillator, and outputs a clock trigger signal and a local-oscillation signal; the local-oscillation signal processor processes the local-oscillation signal and outputs a second local-oscillation signal; the millimeter wave transceiver unit processes an echo signal reflected by an object to be detected, and outputs a first intermediate-frequency signal; the second frequency mixer mixes the second local-oscillation signal and the first intermediate-frequency signal, and outputs a second intermediate-frequency signal; the image processor processes the second intermediate-frequency signal, and images the object to be detected. As the crystal oscillator is used as both a clock trigger source and a local-oscillation signal source, the apparatus does not need additional local-oscillation signal sources.

IPC Classes  ?

• G01S 13/89 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging
• G01S 7/03 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
• G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
• G01S 13/88 - Radar or analogous systems, specially adapted for specific applications

Abstract

The invention relates to a communication method for terahertz waves carrying optical orbital angular momentum. The method comprises: acquiring at least two terahertz waves carrying optical orbital angular momentum, wherein the at least two terahertz waves carrying the optical orbital angular momentum comprise a first terahertz wave and a second terahertz wave, and the optical orbital angular momentum carried in the first terahertz wave and the optical orbital angular momentum carried in the second terahertz wave are in different modes; modulating the first terahertz wave and the second terahertz wave to obtain a multiplexed beam, wherein the propagation mode of the multiplexed beam is consistent with that of a preset waveguide; and transmitting the multiplexed beam to a receiving end through the preset waveguide. The invention further relates to a communication device for terahertz waves carrying optical orbital angular momentum. For a terahertz communication link carrying optical orbital angular momentum, the above method and device realize channel multiplexing, which can expand the communication capacity of the terahertz communication link, thereby improving the communication efficiency.

IPC Classes  ?

• H04B 10/90 - Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation

Abstract

Provided is a spectrometer, comprising: a collimating element (2) for converting a broadband beam into parallel light; a dispersion device (8) for dispersing the parallel light into a plurality of beams of dispersed light based on the wavelengths thereof; a focusing element (5) for focusing dispersed light with the same wavelength, the focusing element (5) focusing dispersed light with different wavelengths onto different positions in a focal plane, and focal spots of all the dispersed light being arranged along a straight line; and a detecting device (6) performing detection at a plurality of positions in the focal plane, the detecting device being used for detecting multiple types of dispersed light with different preset wavelengths. When an incident angle of the parallel light incident to the dispersion device (8) is fixed, the dispersion device (8) and the focusing element (5) cooperate with each other in such a manner that the focusing positions of the multiple types of dispersed light with different preset wavelengths and the multiple detection positions are in one-to-one correspondence; and the difference between the wave numbers of any two adjacent beams of the dispersed light among the dispersed light with the different preset wavelengths is equal, thereby greatly reducing the number of operations during imaging by means of the spectrometer, saving on the imaging time, and improving the imaging speed.

IPC Classes  ?

• G01J 3/28 - Investigating the spectrum
• G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details

Abstract

The present invention relates to a laser light source based on the application of OCT spectral analysis. The laser light source comprises: a laser module; a temperature control circuit, connected to the laser module and used for detecting and regulating a temperature value of the laser module in real time; an MCU module, connected to the temperature control circuit and used for controlling, according to the detected temperature value, the temperature control circuit to regulate the temperature value of the laser module, so that the temperature of the laser module keeps constant; a current control circuit, connected to the laser module and used for collecting and regulating a current value of the laser module in real time. The MCU module is connected to the current control circuit and is also used for controlling, according to the collected current value, the current control circuit to regulate the amplitude of a current output to the laser module, so that the current output to the laser module keeps constant. The constant-temperature and constant-current control of a laser module are realized by providing a temperature control circuit and a current control circuit, so that the performance of the laser light source is stable and reliable.

IPC Classes  ?

• H01S 3/102 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
• H01S 3/04 - Arrangements for thermal management
• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry

Abstract

The present invention relates to the field of infrared communications, and provides a band-stop filter, comprising a filter unit structure. The filter unit structure comprises a first metal layer, a first dielectric layer, and a second metal layer. The first metal layer, the first dielectric layer, and the second metal layer are sequentially stacked. The first metal layer and the second metal layer have the same structure. The metal layer, the dielectric layer, and the metal layer are sequentially stacked to form the filter unit structure, so that the wide filter band of the band-stop filter is realized, and the band-stop filter can be applied to future high-speed communications.

IPC Classes  ?

• H01P 1/203 - Strip line filters

Abstract

A preparation method for an AZO transparent conductive thin film, comprising the following steps: providing a substrate and performing cleaning treatment on the surface of the substrate; providing a zinc oxide seed solution, and depositing the zinc oxide seed solution on the substrate to prepare a zinc oxide seed layer combined on the surface of the substrate; providing a zinc oxide deposition solution, placing the substrate deposited with the zinc oxide seed layer in the zinc oxide deposition solution, and enabling the substrate to be completely immersed in the zinc oxide deposition solution, wherein the surface of the substrate deposited with the zinc oxide seed layer is not adhered to wall; under a heating condition, introducing aluminum ions to the zinc oxide deposition solution continuously and stirring to grow and prepare an AZO pre-fabricated thin film on the surface of the zinc oxide seed layer; and performing ultraviolet radiation treatment on the AZO pre-fabricated thin film to prepare the AZO transparent conductive thin film.

IPC Classes  ?

• H01L 31/18 - Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
• H01L 31/0224 - Electrodes

Abstract

An optical coherence tomography system (100), comprising: a light source (110), an optical fiber coupler (120), a reference arm (130), a sample arm (140), a signal collection module (150) and a signal processing module (160). The light source (110) provides initial light; the optical fiber coupler (120) receives the initial light and splits the initial light into multiple paths of output light, wherein the multiple paths of output light comprise one path of reference light and one path of sample light; the reference arm (130) is used for receiving the reference light and transmitting reflected light of the reference light back to the optical fiber coupler (120); the sample arm (140) uses the sample light to detect a sample to be detected (200), wherein the sample light is scattered at the sample to be detected (200) to generate back-scattered light, the back-scattered light is transmitted back to the optical fiber coupler (120), the back-scattered light and the reflected light generate interference in the optical fiber coupler (120) to form interference light, and the interference light is split by the optical fiber coupler (120) into multiple paths of interference spectra; the signal collection module (150) is used for respectively collecting various paths of interference spectra; and the signal processing module (160) generates, according to spectral line signals of various paths of interference spectra, a detection image of the sample to be detected (200) so as to eliminate imaging interference on the sample to be detected (200).

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01B 9/02 - Interferometers
• G01N 21/45 - Refractivity; Phase-affecting properties, e.g. optical path length using Schlieren methods

Abstract

A TeraHertz wave-based detection method and system for rice. The method comprises: scanning a sample to be detected by using an electromagnetic wave in a TeraHertz frequency band as an incident wave; collecting reflected waves, reflected by the sample to be detected, in the TeraHertz frequency band, and obtaining a reflection spectrum of the reflected waves; and detecting a chalky region of the sample to be detected according to the reflection spectrum. The TeraHertz wave-based detection method and system for rice are based on different light intensities of reflected waves in a chalky region and a non-chalky region, and whether a chalky region exists inside a sample to be detected can be determined according to the reflection spectrum obtained by detecting the reflected waves at different positions.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

Disclosed is a blind equalization method. The method comprises: acquiring multiple stages of pre-processing sub-models that are successively iterated; acquiring multiple stages of post-processing sub-models that are successively iterated; processing multiple paths of parallel input signals by using the multiple stages of pre-processing sub-models that are successively iterated, so as to obtain multiple paths of pre-processed data; performing equalization filtering processing on the multiple paths of pre-processed data to obtain multiple paths of equalized data; and processing the multiple paths of equalized data by using the multiple stages of post-processing sub-models that are successively iterated, so as to obtain multiple paths of output signals. Further disclosed is a blind equalization system, a computer device and a readable storage medium. By means of the blind equalization method and system, the computer device and the readable storage medium, when the system processes multiple paths of parallel input signals, the processing by means of various pre-processing sub-models and various post-processsing sub-models has a higher processing speed, but a hardware configuration requirement is lower.

IPC Classes  ?

• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

Abstract

A drive apparatus of a semiconductor laser, comprising: a drive module (110) that is connected to a semiconductor laser (500), the drive module providing a drive current to the semiconductor laser; a current monitoring module (120) that is used for monitoring, in real time, the drive current and outputting a value of the drive current; a controller (130) that is connected to the current monitoring module, the controller determining, according to the value of the drive current, whether the drive current meets requirements, and controlling the working state of the semiconductor laser according to a determination result. The drive apparatus may prevent a situation in which the semiconductor laser still operates when the drive current does not meet requirements, ensuring that the semiconductor laser always operates when the drive current meets requirements. Which is to say that the semiconductor laser always operates under a stable drive current, which prevents the semiconductor laser from being damaged under an unstable drive current, thereby effectively protecting the semiconductor laser.

IPC Classes  ?

• H01S 5/042 - Electrical excitation

Abstract

The present invention relates to the field of terahertz communication. Provided is a terahertz band-pass filter comprising a filter unit structure, the filter unit structure comprises a first resonator, a dielectric layer and a second resonator which are sequentially laminated. The first resonator comprises a metal plate provided with a hollow pattern, the hollow pattern comprises a first bar shape and a second bar shape extending perpendicularly to the first bar shape from both ends of the first bar shape, and the first resonator and the second resonator have the same structure. The present invention achieves the wide filter band of the terahertz band-pass filter by adopting a first resonator-dielectric layer-second resonator provided with a hollow pattern to form the filter unit structure, and can be applicable to broadband communication.

IPC Classes  ?

• H01P 1/20 - Frequency-selective devices, e.g. filters

Abstract

The present application relates to an ATR mode-based material composition identification method, a device, a computer apparatus, and a storage medium. The method comprises: acquiring, in an ATR mode, a total reflection signal received by a detector when a terahertz wave irradiates an ATR module, and obtaining a reference signal; acquiring, in the ATR mode, a total reflection signal received by the detector when a terahertz wave irradiates the ATR module in which a material under test is placed, and obtaining a testing signal; acquiring spectral information of the material under test according to the reference signal and the testing signal; and comparing the spectral information of the material under test against pre-stored spectral information of multiple standard items, and obtaining the composition of the material under test. The method improves accuracy when identifying the composition of a material.

IPC Classes  ?

• G01N 21/552 - Attenuated total reflection
• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
• G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation

Abstract

The present invention relates to the field of quantum communications, and provides a clock synchronization system and method. A clock synchronization system, comprising a signal sensing end and a signal receiving end. The signal sending end comprises a first laser pulse generator, a second laser pulse generator and an optical coupling module; the signal receiving end comprises a separation module, a photovoltaic conversion module and an optical detection module; and the signal receiving end is used for receiving a coupled optical signal, and separating, detecting and analyzing the coupled optical signal according to a wavelength difference of the coupled optical signal. In the present invention, laser of different wavelengths are coupled to a signal receiving end by an optical coupling module in a signal sending end, and an optical separation module separates the coupled optical signal according to a wavelength difference by means of the detection and processing of an optical detection module. It is ensured that a time reference is not affected by an optical path difference, simplifying the design complexity in electronics and supporting software, and avoiding impact on a system time resolution brought about by the optical path change of the receiving end.

IPC Classes  ?

• H04J 3/06 - Synchronising arrangements

Abstract

A millimeter wave security inspection instrument debugging system and a millimeter wave security inspection instrument debugging method, which are used for debugging the imaging definition of a millimeter wave holographic imaging security inspection system. A main control apparatus is used for generating a millimeter wave detection signal and a reference signal. The main control apparatus is also used for, where a millimeter wave transmitting antenna, a millimeter wave receiving antenna and a detected object are respectively located at different relative positions, transmitting the millimeter wave detection signal to the detected object by means of the millimeter wave transmitting antenna, and receiving an echo signal reflected from the detected object by means of the millimeter wave receiving antenna, and then using a holographic image technique to perform three-dimensional imaging according to the reference signal and the echo signal. The main control apparatus can finally obtain a plurality of three-dimensional imaging results, so that the optimal relative positions of the millimeter wave transmitting antenna, the millimeter wave receiving antenna and the detected object can be determined, which results are applied to a millimeter wave holographic imaging security inspection system, thereby improving the imaging definition of the millimeter wave holographic imaging security inspection system.

IPC Classes  ?

• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups
• G01S 13/89 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging
• G01V 8/10 - Detecting, e.g. by using light barriers

Abstract

A multi-frequency terahertz detection device, system and method therefor. The detection device comprises: a multi-frequency terahertz transmitting device (1) for transmitting terahertz waves of different frequencies; a scanning device (3) disposed on a transmitting path of the multi-frequency terahertz transmitting device (1) and used for reflecting terahertz waves to a to-be-tested article (10) so as to scan the to-be-tested article (10); an imaging device (7) disposed on a transmission light path of the to-be-tested article (10); a reflecting device (4) disposed on the transmission light path from the to-be-tested article (10) to the imaging device (7) and used for reflecting terahertz waves of different frequencies, transmitted from the to-be-tested article (10), to a power detection device (9) when suspected articles are detected; and a power detection device (9) disposed on a reflecting light path of terahertz waves of different frequencies, transmitted from the to-be-tested article (10).

IPC Classes  ?

• G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation

Abstract

A method and apparatus for detecting the quality of a drug based on electromagnetic waves. The method comprises the following steps: emitting electromagnetic waves in a Terahertz frequency band to a drug to be detected (S110), wherein the electromagnetic waves in a Terahertz frequency band are detection waves; detecting an absorption spectrum of the drug to be detected for the electromagnetic waves, so as to obtain a time-domain detection absorption spectrum of the drug to be detected for the detection waves (S120); performing a Fourier transform on the time-domain detection absorption spectrum to obtain a frequency-domain detection absorption spectrum (S130); and determining whether the chemical composition and dosage of the drug to be detected satisfies standards according to a preset frequency-domain reference absorption spectrum and the frequency-domain detection absorption spectrum (S140). By means of the method and apparatus, whether the quality of a drug to be detected is up to standard can be detected by analyzing a frequency-domain detection absorption spectrum of the drug to be detected for electromagnetic waves in a Terahertz frequency band, and the detection is convenient and quick.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

The present application relates to a method, apparatus and system for collecting a Terahertz time-domain pulse signal, and a storage medium and a computer device. The method comprises: issuing, according to a received external control message, a delay control instruction for controlling the state of a delay line; when the delay line is in an operating state, acquiring a Terahertz time-domain pulse signal and caching the Terahertz time-domain pulse signal in a preset data buffer queue; when the data buffer queue is in a saturated state, pushing a Terahertz time-domain pulse signal that has already been cached in the current data buffer queue; and returning to the step of caching the Terahertz time-domain pulse signal in a preset data buffer queue. According to the solution of the present application, by importing a collected pulse signal into a preset data buffer queue, and pushing pulse signal data out of the data buffer queue when the data buffer queue is saturated, the problems that a communication duration is long and unequal interval collection may be easily caused when directly pushing collected data are avoided, thereby realizing the quick and reliable collection of data.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

A radio frequency connection apparatus and a manufacturing method therefor. The radio frequency connection apparatus (10) comprises: a radio frequency connector (100), adapted to be electrically connected to a transmission line (300), the radio frequency connector (100) comprising a housing conductor, a center dielectric, and an inner conductor, and the inner conductor being supported in the housing conductor by means of the center dielectric and partially extending outwards; and a lengthening component (200), the two ends of the lengthening component being respectively connected to the extended part of the inner conductor of the radio frequency connector (100) and the transmission line (300), and the lengthening component being used for lengthening the inner conductor part of the radio frequency connector (100). The manufacturing method is used for manufacturing the radio frequency connection apparatus (10).

IPC Classes  ?

• H01R 13/02 - Contact members
• H01R 27/00 - Coupling parts adapted for co-operation with two or more dissimilar counterparts
• H01R 24/40 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency

Abstract

The present invention relates to a wireless communication method. The method comprises: dividing a space determined by a service scope into a plurality of non-overlapping angular spaces; sending a connection request signal to each angular space in a preset order; receiving response signals from corresponding device nodes of the angular spaces to establish communication links with the device nodes corresponding to the response signals; and carrying out data transmission in corresponding angular spaces according to the communication links and the device nodes corresponding to the response signals. The present invention further relates to a wireless communication device and a storage medium. The device includes a dividing module, a connecting module and a transmitting module. The storage medium stores a computer program that, when executed by a processor, can be used to perform the steps of the method of any of the above-mentioned embodiments. According to the described wireless communication method, device and storage medium, the connection and the data transmission between an access point and the device nodes are both performed in corresponding angular spaces, thereby improving communication efficiency and network throughput.

IPC Classes  ?

• H04B 7/0413 - MIMO systems
• H04B 7/06 - Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Abstract

A sample loading assembly (100) for terahertz spectroscopic measurement. The sample loading assembly (100) for terahertz spectroscopic measurement comprises: a support layer (130), a first adsorption layer (110) and a second adsorption layer (120), wherein the support layer (130) is clamped between the first adsorption layer (110) and the second adsorption layer (120), so that a gap of 0.2 mm to 0.5 mm is formed between the first adsorption layer (110) and the second adsorption layer (120), and the first adsorption layer (110) and the second adsorption layer (120) are both nitrocellulose membranes. A test method for a terahertz spectrum, with the sample loading assembly (100) for terahertz spectroscopic measurement being used therein.

IPC Classes  ?

• G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light

Abstract

Provided is a indomethacin detection method, comprising: producing and providing indomethacin tablets containing different mass gradients; under the same preset conditions, acquiring characteristic absorption peaks of the indomethacin tablets under different mass gradients for terahertz wave radiation; using a terahertz wave to radiate a sample to be detected, and acquiring a characteristic absorption peak of the sample to be detected for terahertz wave radiation; and determining whether the characteristic absorption peak of the sample to be detected for the terahertz wave radiation and the characteristic absorption peaks of the indomethacin radiation under different mass gradients for the terahertz wave radiation satisfy the similarities under the set conditions, and if so, determining that the sample to be detected contains indomethacin. The present invention overcomes the problem that a traditional method damages a sample, and that using a terahertz wave to radiate an indomethacin tablet is high risk and has a high cost; furthermore, since a sample is produced by means of a tableting method, the speed of subsequently using the terahertz detection technology for detection is faster, and the obtained result is more accurate and reliable.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
• G01N 21/3563 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor

Abstract

The present invention relates to a transflective integrated device, which comprises an emission module, a receiving module, an emission support frame, a receiving support frame, a bearing platform and a base. The emission module is arranged on the emission support frame; the receiving module is arranged on the receiving support frame; the bearing platform is arranged on the base, for holding a sample to be tested; the emission support frame and the receiving support frame can be arranged on the base in a relatively movable manner; the positions of the emission support frame and the receiving support frame are adjusted so that terahertz waves radiated by the emission module can be focused onto the sample, and are reflected or transmitted by the sample and then converged to the receiving module, so as to realize the transmissive and reflective measurement of the sample. In the transflective integrated device, a transmissive mode and a reflective mode are integrated so that the structure of a system is more compact, saving on a certain cost.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

A Wilkinson power divider, comprising a dielectric layer, a signal metal layer attached to one side of the dielectric layer, and a metal bottom layer attached to the other side of the dielectric layer, the signal metal layer, the dielectric layer, and the metal bottom layer forming a microstrip line structure, and the signal metal layer comprising: an input port, a microwave transmission branch, an output port, an isolation resistor, a first triangular pile structure and a second triangular pile structure. Compared with the traditional ultra-wideband Wilkinson power divider, the Wilkinson power divider of the present invention significantly saves the circuit layout area on the basis of effectively widening the frequency band.

IPC Classes  ?

• H01P 5/16 - Conjugate devices, i.e. devices having at least one port decoupled from one other port

Abstract

The present invention relates to a small-scale portable terahertz spectrometer, which comprises a terahertz spectrometer component and a housing for fixing the terahertz spectrometer component. The terahertz spectrometer component comprises: a beam splitting module for splitting incident light into pump light and detection light, a delay module for adjusting the delay of a time signal between the pump light and the detection light, and an optical turning module for turning the pump light and the detection light. The housing comprises: a component fixation device. The fixation device respectively fixes the beam splitting module, the delay module and the optical turning module, ensuring the accuracy of an incident light transmission path, and thus promoting the stability of an optical path. Moreover, the housing integrates the various modules into the housing, reducing the space occupied by the various modules, having the functions of being easy to assemble, integral, movable, etc., and realizing a portable function.

IPC Classes  ?

• G01J 3/28 - Investigating the spectrum
• G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details

Abstract

The present invention relates to a wireless communication method. The wireless communication method comprises: sending a request sending signal to a receiving end; transmitting the request sending signal by means of electromagnetic waves in a first frequency band; receiving a response signal from the receiving end; and performing data transmission with the receiving end, response signal and data transmission being performed by means of electromagnetic waves in a second frequency band, and the frequency of the electromagnetic waves in the second frequency band being higher than that of the electromagnetic waves in the first frequency band. The present invention relates to another wireless communication method, comprising: receiving a request sending signal from a sending end; transmitting the request sensing signal by means of electromagnetic waves in a first frequency band; and sending a response signal to the sending end, the response signal and a data signal being transmitted by means of electromagnetic waves in a second frequency band, wherein the frequency of the second frequency band is higher than that of the first frequency band. The present invention further relates to a wireless communication device. By means of the wireless communication methods and device, a sending end can efficiently transmit data to a receiving end.

IPC Classes  ?

• H04B 5/02 - Near-field transmission systems, e.g. inductive loop type using transceiver
• H04W 72/02 - Selection of wireless resources by user or terminal

Abstract

Disclosed is an optical structure, comprising a first reflector and a second reflector. The first reflector comprises a first body and a first right-angled portion recessed in the first body. The first right-angled portion comprises a first mirror surface and a second mirror surface facing each other. The second reflector comprises a second body and a second right-angled portion recessed in the second body. The second right-angled portion comprises a third mirror surface and a fourth mirror surface facing each other. The first right-angled portion and the second right-angled portion are oppositely arranged at an interval in a first direction. The first right-angled portion and the second right-angled portion are staggered by a distance in a second direction intersecting with the first direction. Light rays are incident on the first reflector or the second reflector in the first direction. For the optical structure provided by the invention, the optical path can be increased without the need to increase the volume of the optical structure. Further disclosed is a delay device comprising the above-mentioned optical structure.

IPC Classes  ?

• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
• G02B 17/06 - Catoptric systems, e.g. image erecting and reversing system using mirrors only

Abstract

The present invention relates to an optical fiber micro-heater, comprising: an optical fiber, which is provided with a light exit end surface and which is used for receiving and transmitting an optical signal to the light exit end surface; metal electrodes, which cover an end portion of the optical fiber that is provided with the light exit end surface; a graphene layer, which covers the light exit end surface of the optical fiber which is covered by the metal electrodes. The present invention further relates to a preparation method for an optical fiber micro-heater, comprising: preparing a pair of metal electrodes on an optical fiber tangential to the light exit end surface; providing a metal base that is covered by graphene, and transferring the graphene from the metal base into deionized water to form a graphene thin film; passing the light exit end surface of the optical fiber that is manufactured with metal electrodes through the graphene thin film; extracting and drying the optical fiber that passes through the graphene thin film. The quick transfer of heat may be achieved due to the excellent heat conduction performance of graphene, thus increasing heating efficiency; moreover, the heating of a designated place within a small range may be achieved by the optical fiber micro-heater due to the small size and good flexibility of the optical fiber.

IPC Classes  ?

• H05B 3/14 - Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic

Abstract

A fiber laser comprises a pump source (11), an annular optical path (10), a tuning device, and a current adjustment device. The pump source provides pump light for a resonant optical path. The tuning device is disposed on the annular optical path. The tuning device comprises a graphene film (263) and a first optical fiber (264), and the graphene film covers an end surface of a fiber core at one end of the first optical fiber. The current adjustment device is connected to the graphene film, and the current adjustment device is used to electrify the graphene film and adjust the current passing through the graphene film. By adjusting the current passing through the graphene film, the temperature of the graphene film is adjustable, and the modulation depth of the tuning device with respect to transmitted laser passing through the tuning device is modified, such that the performance of the fiber laser is adjustable. In addition, because the tuning device is an optical fiber device integrated by the first optical fiber and the graphene film, optical signal transmission loss via the tuning device is low, such that tuning performance of the fiber laser is improved.

IPC Classes  ?

• H01S 3/067 - Fibre lasers
• G02F 1/035 - 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 modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect in an optical waveguide structure

Abstract

An optical fiber tapering apparatus and method. The optical fiber tapering apparatus comprises: a bottom plate used for providing support; a rotating module provided on the bottom plate and used for rotationally stretching an optical fiber to be processed that is connected to the rotating module; a heating furnace provided on the bottom plate, disposed side by side with the rotating module, and used for heating a portion of the optical fiber to be processed to a molten state in order for stretching; and a heating pipe provided in the heating furnace, and used for the optical fiber to be processed to pass through, so as to fix the optical fiber to be processed and prevent the portion of the optical fiber to be processed that is located in the heating pipe from being oxidized during heating. An optical fiber tapering method based on the optical fiber tapering apparatus comprises the steps of interspersing, placement, winding, ventilation, heating, stretching and the like.

IPC Classes  ?

• C03B 37/15 - Re-forming fibres or filaments with heat application, e.g. for making optical fibres
• G02B 6/287 - Structuring of light guides to shape optical elements with heat application

Abstract

Provided are a whole blood plasma separation system and method. The system comprises: a first blood separation apparatus and a second blood separation apparatus. The first blood separation apparatus comprises a blood collection unit and at least one first micro flow control chip, a micro column array is provided in the first micro flow control chip, and a minimum column interval of the micro column array is greater than or equal to the diameter of an erythrocyte. The second blood separation apparatus comprises a second micro flow control chip, a plasma recovery unit and a waste fluid recovery unit, and a micro flow passage is provided on the second micro flow control chip. The blood collection unit, the at least one first micro flow control chip and the second micro flow control chip are arranged along the flow direction of blood and are successively connected through fluid pipes in a head-to-tail manner; the plasma recovery unit is connected to a plasma outlet of the micro flow passage through a fluid pipe; and the waste fluid recovery unit is connected to a waste fluid outlet of the micro flow passage through a fluid pipe. The solution can realise rapid separation of hemocytes and thrombocytes in a minute amount of blood sample, improving the detection efficiency of the blood sample.

IPC Classes  ?

• G01N 1/40 - Concentrating samples
• G01N 33/49 - Physical analysis of biological material of liquid biological material blood

Abstract

An optical fiber laser, comprising a pumping light source (140), a resonant optical circuit (110), a tuning device (120) and a current adjustment device; the pumping light source provides pumping light for the resonant optical circuit; the tuning device is provided on the resonant optical circuit, and the tuning device comprises a grapheme film (121) and a first optical fiber (122), the grapheme film covering the end face of a fiber core on one end of the first optical fiber; and the current adjustment device is connected to the grapheme film, and the current adjustment device is used for energizing the grapheme film and adjusting the current passing through the grapheme film. On one hand, as the current passing through the grapheme film is adjustable, the temperature of the grapheme film is adjustable, and the depth of modulation performed by the tuning device on the laser transmitted therethrough is changed, making the performance of the optical fiber laser tunable. On the other hand, the tuning device is an optical fiber device integrating the first optical fiber and the grapheme film, and therefore, the loss of an optical signal during transmission of same through the tuning device is small, enabling the optical fiber laser to have a better tuning effect.

IPC Classes  ?

• H01S 3/067 - Fibre lasers
• G02F 1/035 - 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 modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect in an optical waveguide structure

Abstract

A plasmon waveguide (10), a biosensor chip (100) and a system. The plasmon waveguide (10) is applied to the biosensor chip (100), and comprises a substrate (11) and a plasmon structure (12) provided on the upper surface of the substrate (11); the plasmon structure (12) comprises a plurality of plasmons (121) periodically arranged, the plasmons (121) being metal split rings, and the annular openings of the plasmons (121) being used for fixing antibody probes (122). The plasmon waveguide (10) is provided in the biosensor chip (100), the target biomolecules flowing into the detection liquid of a microfluidic channel (31) can be captured by means of the antibody probes (122), and the plasmon waveguide (10) is used to enhance the signal strength of terahertz waves emitted to the biosensor chip (100), thereby enhancing the signal strength of the reflected terahertz waves detected by a terahertz analyzer (300), improving the detection sensitivity, the signal-to-noise ratio and the reliability.

IPC Classes  ?

• G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation

Abstract

A blood separation pretreatment chip and a blood separation device. The blood separation pretreatment chip comprises at least one micropillar array arranged in succession along the direction of blood flow, pillar spacings in each said micropillar array are different from each other, the pillar spacings of said at least one micropillar array decrease in succession according to the arrangement sequence of said at least one micropillar array, and said at least one micropillar array at least comprises a red blood cell trapping micropillar array. Said red blood cell trapping micropillar array traps red blood cells in blood, so as to filter red blood cells in blood. Blood flows in from the inlet of said blood separation pretreatment chip and is subjected to trapping and filtration by means of said at least one micropillar array in sequence, so as to obtain a plasma comprising less than a predetermined amount of red blood cells and platelets, which flows out from the outlet of said blood separation pretreatment chip. Said chip and device can achieve rapid separation of a very small amount of a blood sample, increasing the detection efficiency of the blood sample.

IPC Classes  ?

• B01L 3/00 - Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
• C12M 1/34 - Measuring or testing with condition measuring or sensing means, e.g. colony counters

Abstract

Provided are a blood cell capture chip and method. The method comprises steps of: arranging specific antibody-fluorescent molecule-magnetic nanoparticles in a micro-channel, and fixing a magnetic structure at the bottom of a glass substrate, so that the specific antibody-fluorescent molecule-magnetic nanoparticles are attracted and fixed by the magnetic structure; capturing target cell antigen in blood by the specific antibody-fluorescent molecule-magnetic nanoparticles, so that fluorescent molecules in the specific antibody-fluorescent molecule-magnetic nanoparticles emit fluorescence due to the fact that the fluorescent molecules gather to be in a stimulated state, realizing effective enrichment and distinguish of the target cell antigen, and the blood cell capture chip and method can be widely applied to detection operation of pathological cells such as circulating tumor cells, cancer cells and the like.

IPC Classes  ?

• G01N 33/533 - Production of labelled immunochemicals with fluorescent label
• G01N 33/569 - Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses

Abstract

A terahertz beam splitter, which is a Sommerfeld waveguide of a Y-shaped structure. Three ends of the Y-shaped structure are respectively a terahertz coupling end (10) and two terahertz beam-splitting arms (11 and 12). The terahertz coupling end (10) is used for coupling and transmitting an incident terahertz wave. The two terahertz beam-splitting arms (11 and 12) are two branches branching off from the terahertz coupling end (10), and are used for splitting the incident terahertz wave to form two emergent terahertz waves and transmit same. The terahertz wave is transmitted on the surface of the Sommerfeld waveguide by utilising a surface plasma mode of the Sommerfeld waveguide, and the beam splitting of the terahertz wave is realised by means of the two branches of the Y-shaped structure. The terahertz beam splitter has a simple structure, and has the advantages of a large bandwidth, a low loss and a low chromatic dispersion.

IPC Classes  ?

• G02B 6/125 - Bends, branchings or intersections

Abstract

The present invention relates to an ultra-wideband Wilkinson power divider. The power divider comprises a dielectric layer, a signal metal layer attached to one side of the dielectric layer, and a metal bottom layer attached to the other side of the dielectric layer. The signal metal layer comprises: a microwave transmission branch used to divide a microwave signal into multiple microwave branch signals for output; and a microstrip line expansion structure used to increase the number of poles of the Wilkinson power divider, wherein the microstrip line expansion structure is composed of microstrip lines, and has one end connected to the microwave transmission branch and the other end is a free end, and the length of each microstrip line is 1/4 a of central wavelength of microwaves passing through the ultra-wide-band Wilkinson power divider. By arranging a microstrip line expansion structure on a transmission branch of a Wilkinson power divider, the number of poles of the Wilkinson power divider are increased, such that a frequency band can be broadened, thereby achieving an ultra-wide-band Wilkinson power divider with a simple structure.

IPC Classes  ?

• H01P 5/16 - Conjugate devices, i.e. devices having at least one port decoupled from one other port

Abstract

The invention discloses a method of extracting a small-signal model of a AlGaN/GaN HEMT and a parameter thereof. According to the invention, the small-signal model of a AlGaN/GaN HEMT is determined based on a conventional AlGaN/GaN HEMT small-signal model, and by adding, in a parasitic unit, a first coplanar waveguide capacitance between a gate and a source, and a second coplanar waveguide capacitance between the gate and a drain. Since the AlGaN/GaN HEMT device and a coplanar waveguide device have similar structures, when in use at a high frequency, the first coplanar waveguide capacitance and the second coplanar waveguide capacitance are introduced to take additional parasitic capacitances resulting from a coplanar waveguide effect of the AlGaN/GaN HEMT device into consideration, thereby reflecting an operating state and a device characteristic of the AlGaN/GaN HEMT device more accurately, and increasing accuracy of the device model.

IPC Classes  ?

• G06F 17/50 - Computer-aided design

Abstract

Provided in the solution are a device for monitoring a quantum key distribution light source and a monitoring method thereof. The device comprises adjustable attenuators respectively arranged on a light path of each of polarized light sources and connected to the polarized light sources, beam splitters connected to the adjustable attenuators, and power detection ports connected to the beam splitters, wherein the beam splitters are used for separating a beam from light signals output by the polarized light sources for monitoring the light sources; the power detection ports are used for converting the light signals to analog electrical signals and calculating the power of the analog electrical signals; and the adjustable attenuators are used for a user to adjust attenuation of the light signals output by the polarized light sources according to the power of the analog signals so as to control the polarized light sources in real time. The solution can accurately distinguish which light sources in four polarization directions the jitter of the light sources comes from, and can feed back and adjust attenuation of the jittering light sources in real time to prevent interruption of quantum key distribution caused by jitter of the light source on any path, thereby improving the efficiency of key distribution.

IPC Classes  ?

• H04L 9/08 - Key distribution
• H04B 10/70 - Photonic quantum communication

Abstract

A terahertz generation system based on a unidirectional carrier transmission photodetector (6). The system comprises a picosecond pulse laser device (1), a transmission module (3), a beam splitter (4), an amplitude modulation module (5), a unidirectional carrier transmission photodetector (6) and a terahertz detection apparatus (7). The picosecond pulse laser device (1) emits a pulse laser on the order of picoseconds at a high repetition frequency; the picosecond pulse laser is transmitted via the transmission module (3), and spectrum spreading thereof is achieved so as to obtain a pulse laser with the pulse width being approximately tens to hundreds of femtoseconds; and after being modulated by the amplitude modulation module (5), the pulse laser is input into the unidirectional carrier transmission photodetector (6). Since the unidirectional carrier transmission photodetector (6) has the properties of a high light intensity and high-speed transmission, terahertz pulse signals with a high power and high speed can be excited, thereby achieving a high-power and high-speed terahertz pulse signal communication.

IPC Classes  ?

• H01S 1/02 - Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range solid

Abstract

A terahertz full-polarization-state detection spectrograph, comprising a terahertz wave generator (10), a polarizer (11), a polarizing beam-splitting sheet (12), a horizontal terahertz detector (13), and a vertical terahertz detector (14). The terahertz wave generator (10) generates a terahertz wave and the purity of the terahertz wave is optimized by the polarizer (11); a measured object modulates the terahertz wave the purity of which is optimized to obtain a terahertz modulated wave; the polarizing beam-splitting sheet (12) decomposes the terahertz modulated wave into a horizontal terahertz wave and a vertical terahertz wave which are vertical to each other in a polarization state; the two corresponding terahertz detectors (13, 14) are used for measuring the two terahertz waves respectively, and then the characteristics of a measured sample (50) are analyzed according to the measurement result. The terahertz full-polarization-state detection spectrograph can quickly measure full-polarization-state terahertz waves accurately, thereby improving the measurement precision and measurement efficiency of the measured sample (50).

IPC Classes  ?

• G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation
• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]

Abstract

A millimeter wave imaging apparatus, comprising: a crystal oscillator (1), a power divider (2), a millimeter wave transceiver unit (3), a local-oscillation signal processing unit (4), a second frequency mixer (5) and an image processing module (6); the power divider (2) performs power distribution on an oscillation signal generated by the crystal oscillator (1), and outputs a clock trigger signal and a local-oscillation signal; the local-oscillation signal processing unit (4) processes the local-oscillation signal and outputs a second local-oscillation signal; the millimeter wave transceiver unit (3) processes an echo signal reflected by an object to be detected, and outputs a first intermediate-frequency signal; the second frequency mixer (5) mixes the second local-oscillation signal and the first intermediate-frequency signal, and outputs a second intermediate-frequency signal; the image processing module (6) processes the second intermediate-frequency signal, and images the object to be detected. As the crystal oscillator (1) is used as both a clock trigger source and a local-oscillation signal source, the apparatus does not need additional local-oscillation signal sources, thus simplifying a circuit structure and reducing the costs.

IPC Classes  ?

• G01S 13/89 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging

Abstract

A millimeter wave security inspection instrument debugging system and a millimeter wave security inspection instrument debugging method, which are used for debugging the imaging definition of a millimeter wave holographic imaging security inspection system. A main control apparatus (100) is used for generating a millimeter wave detection signal and a reference signal. The main control apparatus (100) is also used for, where a millimeter wave transmitting antenna (300), a millimeter wave receiving antenna (400) and a detected object (500) are respectively located at different relative positions, transmitting the millimeter wave detection signal to the detected object (500) by means of the millimeter wave transmitting antenna (300), and receiving an echo signal reflected from the detected object (500) by means of the millimeter wave receiving antenna (400), and then using a holographic image technique to perform three-dimensional imaging according to the reference signal and the echo signal. The main control apparatus (100) can finally obtain a plurality of three-dimensional imaging results, so that the optimal relative positions of the millimeter wave transmitting antenna (300), the millimeter wave receiving antenna (400) and the detected object (500) can be determined, which results are applied to a millimeter wave holographic imaging security inspection system, thereby improving the imaging definition of the millimeter wave holographic imaging security inspection system.

IPC Classes  ?

• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups

Abstract

A communication system for two paths of terahertz waves, comprising: a terahertz wave generation module (10); a terahertz wave transmission channel (20) connected to the output port of the terahertz wave generation module (10); and a terahertz wave receiving module (30) connected to the output port of the terahertz wave transmission channel (20). The present application converts, by means of the terahertz wave generation module (10), one path of optical signal sources into one path of horizontally polarized terahertz waves (Ch.1) and one path of vertically polarized terahertz waves (Ch.2), combines them into one beam, transmits the beam by means of the terahertz wave transmission channel (20), and re-divides the beam, by means of the terahertz wave receiving module (30), into a horizontally polarized terahertz wave (Ch.1) and a vertically polarized terahertz wave (Ch.2), so as to receive each of them separately. The present invention can realize the communication of two paths of terahertz waves, and improves the rate and spectrum utilization of terahertz wave communication.

IPC Classes  ?

• H04J 14/06 - Polarisation multiplex systems
• H04B 10/532 - Polarisation modulation

Abstract

A three-dimensional image rebuilding method and device based on Synthetic Aperture Radar imaging. The method comprises: using a transmission signal of an antenna as a local oscillator signal, de-modulating an original collected echo signal reflected from a scanned object, to obtain a first intermediate signal (S11); removing residual video phase in the first intermediate signal to obtain a second intermediate signal (S12); sequentially performing Fourier transformation on the second intermediate signal in the height direction and in the azimuth direction to obtain a third intermediate signal (S13); and performing an inverse non-uniform fast Fourier transformation on the third intermediate signal to obtain a three-dimensional image of the scanned object (S14). The invention can shorten the time required for rebuilding a three-dimensional image while improving the accuracy of image rebuilding.

IPC Classes  ?

• G01S 13/90 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging using synthetic aperture techniques