Abrégé

Disclosed is a system for compressing short or ultra-short light pulses emitted by a light source. The compression system includes:—a first non-linear light pulse compression module including a multi-pass cell, the multi-pass cell including a first non-linear optical medium; and—a second non-linear light pulse compression module including a capillary filled with a gaseous second non-linear optical medium, and a compressor arranged at the output of the capillary, the first non-linear compression module and the second non-linear compression module being arranged in series on the path of a source light beam of source light pulses. Also disclosed is a light-pulses laser system and to a method for compressing short or ultra-short light pulses.

Classes IPC  ?

• G02F 1/35 - Optique non linéaire
• H01S 3/11 - Blocage de modes; Commutation-Q; Autres techniques d'impulsions géantes, p.ex. vidange de cavité

Abrégé

An optical component mount (100) comprises a fixed portion (110) and a movable portion (120), the mount (100) being configured to support at least one optical component, the fixed portion (110) and the movable portion (120) being mechanically connected to each other by a flexible articulation (115) which is capable of allowing the movable portion (120) to move relative to the fixed portion (110). According to the invention, the mount (100) comprises a cooling circuit (180) which is integrated into the fixed portion (110), the movable portion (120) and the articulation (115) and which is capable of allowing a fluid to flow inside the mount (110), the cooling circuit (180) comprising a fluid inlet hole (132) and a fluid outlet hole (134), the fluid inlet hole (132) and the fluid outlet hole (134) being arranged on the fixed portion (110).

Classes IPC  ?

• G02B 7/00 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques
• G02B 7/02 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour lentilles
• G02B 7/18 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour miroirs

Abrégé

LLLL).

Classes IPC  ?

• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés

Abrégé

The invention proposes a method for determining the operational conditions of a method for high-repetition rate femtosecond laser ablation for a given material comprising a first step of determining a set of parameters of a burst of laser pulses adapted to generate an ablation crater in the material, the set of parameters comprising an intra-burst repetition frequency f between several hundred MHz and 100 GHz, a number N of pulses of the burst of laser pulses equal to a number Ne of heating and ablation pulses, with Ne being defined by the equation Nc = (L2charcharchar//Nc per pulse below an ablation threshold fluence Fsl of the material by a single laser pulse.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/0622 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
• B23K 26/352 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  pour le traitement de surface
• B23K 26/362 - Gravure au laser
• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• G01N 25/00 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques

Abrégé

The invention relates to a system for compressing short or ultra-short light pulses emitted by a light source. According to the invention, the compression system (4) comprises: - a first non-linear light pulse compression module (10) comprising a multi-pass cell (14), the multi-pass cell (14) comprising a first non-linear optical medium; and - a second non-linear light pulse compression module (20) comprising a capillary (24) filled with a gaseous second non-linear optical medium, and a compressor (28) arranged at the outlet of the capillary (24), the first non-linear compression module (10) and the second non-linear compression module (20) being arranged in series on the path of a source light beam (100) of source light pulses. The invention also relates to a light-pulsed laser system (1) and to a method for compressing short or ultra-short light pulses.

Classes IPC  ?

• G02F 1/35 - Optique non linéaire

Abrégé

The invention relates to a system and a method for generating high-power laser pulses with very high repetition rate. According to the invention, the laser system includes an oscillator (1) capable of generating a source laser beam comprising a series of source pulses (100) with femtosecond or picosecond duration at a first repetition frequency (F1) no lower than 800 megahertz and an optical amplifier system (2) suitable for receiving and amplifying the series of source pulses (100) at a second repetition frequency (F2) that is equal to or a multiple of the first repetition frequency (F1), the multiple being a non-negative integer greater than or equal to two, so as to generate a series of laser pulses with very high repetition frequency.

Classes IPC  ?

• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés

Abrégé

The invention relates to a system for generating a spatially localised, high-intensity laser beam, comprising: a laser source (80) designed to generate a burst of N laser pulses with a duration of less than or equal to one picosecond, the N laser pulses having a first repetition frequency (f1) greater than or equal to 0.5 gigahertz; a resonant optical cavity (10) designed to receive and store the burst of N laser pulses, the resonant optical cavity (10) being designed to focus the burst of N laser pulses in an interaction region (25) of said resonant optical cavity (10); and a servo control system (13) designed to control the first repetition frequency (f1) relative to the return distance in the resonant optical cavity, such that the N pulses of the burst are superimposed temporally and spatially by constructive interferences in the interaction region (25) so as to form one giant ultra-short and high-energy pulse.

Classes IPC  ?

• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H05G 2/00 - Appareils ou procédés spécialement adaptés à la production de rayons X, n'utilisant pas de tubes à rayons X, p.ex. utilisant la génération d'un plasma
• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation

Abrégé

Disclosed is a laser system including a source, for generating a source signal, and an optical amplifier system. The laser system includes a pulse selection or variation device configured to select or vary the source signal so as to form a main signal composed of one or more light pulses. The main signal is temporally variable in terms of rhythm and/or amplitude. The laser system is configured to inject the main signal and a secondary signal into the optical amplifier system. The secondary signal is varied on the basis of the temporal variation in terms of rhythm and/or amplitude of the main signal so as to stabilize the power stored in the optical amplifier system in a time-dependent manner, and the laser system is configured to spatially separate the amplified main signal from the amplified secondary signal.

Classes IPC  ?

• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation
• H01S 3/101 - Lasers munis de moyens pour changer l'origine ou la direction du rayonnement émis
• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés

Abrégé

Disclosed is a nonlinear optical system for generating or amplifying light pulses by N-wave mixing, including a nonlinear optical medium suitable for receiving at least one first light pulse and one second light pulse. The system includes a fast modulation device for modulating a time delay between the second light pulse and the first pulse light in the nonlinear optical medium, the time delay modulation device being placed upstream of the nonlinear optical medium, and the time delay modulation device being modulated at least between a first delay value and a second delay value, so as to modulate the generation or amplification of a light pulse by N-wave mixing of the at least one first light pulse et one second light pulse in the nonlinear optical medium.

Classes IPC  ?

• G02F 1/35 - Optique non linéaire
• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude
• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation
• G02F 1/365 - Optique non linéaire dans une structure de guide d'ondes optique

Abrégé

The invention relates to an apparatus and method for cutting semiconductors or transparent dielectrics. According to the invention, the apparatus comprises: a laser source (1) that generates a laser beam (100) of pulses of femtosecond or picosecond duration; a Bessel-beam-generating optical device (74) configured to receive the laser beam and to spatially concentrate the laser beam into at least one zone on the optical axis (70) of the laser beam, said Bessel-beam-generating optical device (74) being configured to convert a Gaussian spatial intensity distribution of the laser beam into a Bessel spatial intensity distribution of the laser beam transversely to the optical axis in the focal zone; and a passive optical system (90) comprising a phase and/or amplitude mask configured to modify the Bessel spatial distribution of the laser beam transversely and/or longitudinally with respect to the optical axis in the zone.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/067 - Division du faisceau en faisceaux multiples, p.ex. foyers multiples
• B23K 26/38 - Enlèvement de matière par perçage ou découpage
• B23K 26/066 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples au moyen d'éléments optiques, p.ex lentilles, miroirs ou prismes par utilisation de masques
• B23K 26/064 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples au moyen d'éléments optiques, p.ex lentilles, miroirs ou prismes
• C03B 33/02 - Découpe ou fendage des feuilles de verre; Dispositifs ou machines à cet effet
• C03B 33/09 - Sectionnement du verre refroidi par chocs thermiques
• G02B 5/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES Éléments optiques autres que les lentilles
• B23K 26/0622 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
• B23K 103/00 - Matières à braser, souder ou découper

Abrégé

The invention relates to a method for cutting dielectric or semiconductive material with a laser. According to the invention, the method comprises the following steps: emission of a laser beam (100) comprising at least one burst of N femtosecond laser pulses; spatial separation of the laser beam (100) into a first split beam (101) having a first energy, and respectively, a second split beam (102) having a second energy; spatial concentration of energy of the first split beam (101) in a first zone (31) of the material, and respectively, of the second split beam (102) in a second zone (32) of the material, the first zone (31) and the second zone (32) being separate and staggered by a distance dx; and adjustment of the distance (dx) between the first zone (31) and the second zone (32) in such a way as to initiate a straight micro-fracture (45) oriented between the first zone (31) and the second zone (32).

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/067 - Division du faisceau en faisceaux multiples, p.ex. foyers multiples
• B23K 26/38 - Enlèvement de matière par perçage ou découpage
• B23K 26/066 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples au moyen d'éléments optiques, p.ex lentilles, miroirs ou prismes par utilisation de masques
• B23K 26/064 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples au moyen d'éléments optiques, p.ex lentilles, miroirs ou prismes
• C03B 33/02 - Découpe ou fendage des feuilles de verre; Dispositifs ou machines à cet effet
• C03B 33/09 - Sectionnement du verre refroidi par chocs thermiques
• B23K 26/0622 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
• B23K 103/00 - Matières à braser, souder ou découper

Abrégé

Disclosed is a UV-visible laser system having ultrashort pulses with high power and/or high energy. The laser system includes at least one non-linear optical crystal (1) adapted for receiving two distinct ultrashort laser pulses (31, 32) in the visible or infrared domain emitted respectively by two distinct laser pulse sources (11, 12) and a temporal synchronization unit (41, 42) adapted so that the two ultrashort laser pulses (31, 32) are superimposed in time and space in the non-linear optical crystal (1) with any phase shift, and generate, by sum frequency, an ultrashort laser pulse (131) having an optical frequency equal to the sum of the respective optical frequencies of the two distinct laser pulses (31, 32).

Classes IPC  ?

• G02F 1/35 - Optique non linéaire
• G02F 2/02 - Changement de fréquence de la lumière, p.ex. par compteurs quantiques
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/067 - Lasers à fibre optique
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• B23K 26/0622 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• H01S 3/16 - Matériaux solides

Abrégé

The invention relates to a nonlinear optical system for generating or amplifying light pulses by N-wave mixing, including a nonlinear optical medium (20) suitable for receiving at least one first light pulse (51) and one second light pulse (52, 522). According to the invention, the system includes a fast modulating device (40) for modulating a time delay between the second light pulse (52) and the first light pulse (51) in the nonlinear optical medium (20), the device (40, 41, 42) for modulating time delay being placed upstream of the nonlinear optical medium (20), and the device (40, 41, 42) for modulating time delay being modulatable at least between a first delay value (R1) and a second delay value (R2), so as to modulate the generation or amplification of a light pulse (60) by N-wave mixing of said at least one first light pulse (51) and one second light pulse in the nonlinear optical medium (20).

Classes IPC  ?

• G02F 1/35 - Optique non linéaire

Abrégé

The invention relates to a laser system including a source (10), for generating a source signal (100), and an optical amplifier system (30, 31, 32, 33). According to the invention, the laser system comprises a pulse selection or variation device (20) configured to select or vary the source signal (100) so as to form a main signal (120) composed of one or more light pulses. The main signal (120) is temporally variable in terms of rhythm and/or amplitude. The laser system is configured to inject the main signal (110) and a secondary signal (120) into said optical amplifier system (30). The secondary signal (120) is varied on the basis of the temporal variation in terms of rhythm and/or amplitude of said main signal (110) so as to stabilize the power stored in the optical amplifier system (30) in a time-dependent manner, and the laser system is configured to spatially separate the amplified main signal (310) from the amplified secondary signal (320).

Classes IPC  ?

• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation
• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/101 - Lasers munis de moyens pour changer l'origine ou la direction du rayonnement émis

Abrégé

A system and method for generating a burst of ultra-short, high-power laser pulses, the system includes elements for generating laser pulses having a repetition period τ1, amplification elements including an optical amplifier medium, a regenerative optical cavity, elements for injecting the laser pulses into the regenerative optical cavity, and elements for extracting the laser pulses from the regenerative optical cavity. The regenerative optical cavity has a total length such that the duration of a round trip of each pulse is between N−1 and N times the period τ1, wherein N is an integer higher than or equal to 2, the injection elements are adapted for trapping a burst of N laser pulses in the regenerative optical cavity, the extraction elements are suitable to extract the burst of N laser pulses from the regenerative optical cavity, and the optical amplifier medium is suitable for forming a burst of amplified laser pulses.

Classes IPC  ?

• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/107 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation par commande de dispositifs placés dans la cavité utilisant des dispositifs électro-optiques, p.ex. produisant un effet Pockels ou Kerr
• H01S 3/11 - Blocage de modes; Commutation-Q; Autres techniques d'impulsions géantes, p.ex. vidange de cavité
• H01S 3/06 - Structure ou forme du milieu actif

Abrégé

The present invention relates to a UV-visible laser system having ultrashort high-power and/or high-energy pulses. According to the invention, the laser system includes at least one non-linear optical crystal (1) suitable for receiving two separate ultrashort laser pulses (31, 32) in the visible or infrared domain, respectively emitted by two separate sources of laser pulses (11, 12), and time-synchronisation means (41, 42) adapted such that said two ultrashort laser pulses (31, 32) overlap in time and space in said non-linear optical crystal (1) with a given phase shift, and generate, by sum frequency, an ultrashort laser pulse (131) having an optical frequency equal to the sum of the respective optical frequencies of the two separate laser pulses (31, 32).

Classes IPC  ?

• H01S 3/067 - Lasers à fibre optique
• H01S 5/00 - Lasers à semi-conducteurs
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• G02F 1/35 - Optique non linéaire
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• H01S 3/16 - Matériaux solides

Abrégé

3, which is shorter than the duration τ=1/Δν of the bandwidth limitation of the optical amplifier.

Classes IPC  ?

• H01S 3/11 - Blocage de modes; Commutation-Q; Autres techniques d'impulsions géantes, p.ex. vidange de cavité
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/16 - Matériaux solides
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet

Abrégé

The invention relates to a system and method for generating a burst of ultra-short, high-power laser pulses which includes means (1) for generating laser pulses (10) having a repetition period t1, amplification means (2) including an optical amplifier medium (41), a regenerative optical cavity, means for injecting said laser pulses (10) into said regenerative optical cavity, and means for extracting said laser pulses from said regenerative optical cavity. According to the invention, the regenerative optical cavity has a total length such that the duration of a return trip of each pulse is between N-1 and N times the period t1, wherein N is an integer no lower than two, said injection means are adapted for trapping a burst of N laser pulses in said regenerative optical cavity, said extraction means are suitable for extracting said burst of N laser pulses from said regenerative optical cavity, and said optical amplifier medium (41) is suitable for forming a burst of amplified laser pulses (20).

Classes IPC  ?

• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet

Abrégé

2″), so as to form a coherent output beam.

Classes IPC  ?

• H01S 3/067 - Lasers à fibre optique
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation

Abrégé

The invention relates to a system for the optical amplification of high-energy ultrashort light pulses, said system comprising: an oscillator that can emit light pulses of duration t0 subpicosecond, a pre-compensator, and a solid optical amplifier that can amplify the chirped light pulses. According to the invention, the pre-compensator has a negative group velocity dispersion, said pre-compensator being capable of generating negatively chirped light pulses, and the optical amplifier has a positive group velocity dispersion, said optical amplifier being disposed such as to receive and amplify the negatively chirped light pulses. The optical amplifier is configured such that the light pulses can induce a widening of the spectral gain band ∆v by means of self-phase modulation, such as to generate amplified, time-compressed light pulses of duration t3 which is shorter than the duration t=1/∆n of the bandwidth limitation of the optical amplifier.

Classes IPC  ?

• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés

Abrégé

−1 (approximately 20 nm, when expressed in wavelength). A laser including a resonant optical cavity and an amplifier are also described.

Classes IPC  ?

• H01S 3/16 - Matériaux solides
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/042 - Dispositions pour la gestion thermique pour des lasers à l'état solide
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/02 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure
• H01S 3/094 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière cohérente
• H01S 3/0941 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière cohérente produite par un laser à semi-conducteur, p.ex. par une diode laser
• H01S 3/102 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation par commande du milieu actif, p.ex. par commande des procédés ou des appareils pour l'excitation

Abrégé

The present invention relates to a method and a passive device for the coherent combination of two amplified and/or spectrally broadened optical beams using at least one bidirectional optical component (A1, A2). According to the invention, the device comprises an amplitude division ring interferometer comprising optical splitting and recombining means disposed in such a way as to receive an incident optical beam (S0) and to split it spatially into a first secondary input beam (H1) and a second secondary input beam (H2), optical guiding means disposed in such a way as to define an optical path in the form of a ring in said interferometer, the at least one bidirectional optical component (A1, A2) being disposed on the optical path of said ring interferometer, said splitting and recombining means being disposed in such a way as to receive and to recombine spatially, temporally and coherently said first secondary output beam (H1") and said second secondary output beam (H2"), so as to form a coherent output beam.

Classes IPC  ?

• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/067 - Lasers à fibre optique

Abrégé

The present invention relates to a high-gain optical amplifier for a wave to be amplified to a wavelength referred to as the emission wavelength. The optical amplifier includes: optical pumping means (4) producing a pump wave at a wavelength referred to as the pump wavelength; a solid amplifying medium (1) that is doped with active ions, said solid amplifying medium (1) being capable of emitting laser radiation at the emission wavelength when the medium is pumped by the aforementioned pumping means; cooling means (2) capable of cooling the solid amplifying medium (1) to a temperature of no higher than 250 Kelvin; and optical multiplexing means capable of coupling together the pump wave and the wave to be amplified in the amplifying medium. According to the invention, the amplifying medium has Stark sublevels contained within a spectral range of less than 200 cm-1 (approximately 20 nm when expressed as wavelength). The invention also relates to a laser comprising a resonant optical cavity and to an amplifier.

Classes IPC  ?

• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation
• H01S 3/16 - Matériaux solides
• H01S 3/042 - Dispositions pour la gestion thermique pour des lasers à l'état solide
• H01S 3/0941 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière cohérente produite par un laser à semi-conducteur, p.ex. par une diode laser
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants

Abrégé

0 through the chirped pulse amplifier.

Classes IPC  ?

• H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés

Abrégé

L such that the spectral phases generated by the wave guide (6) are opposed or quasi opposed to the predetermined spectral phases generated by the compressor (8) in order to generate compressed ultra-short light pulses (9) at the output of the compressor (8) with a planar or quasi planar spectral phase.

Classes IPC  ?

• H04B 10/17 - dans lesquels le traitement ou l'amplification sont effectués sans conversion à partir de la forme optique du signal
• H01S 3/102 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation par commande du milieu actif, p.ex. par commande des procédés ou des appareils pour l'excitation

Abrégé

The invention relates to a frequency-drift fibre amplifier (1) with nonlinear compensation, that comprises means (5) for generating a light pulse (10) having an initial power P0 and an initial duration T, a stretcher (2) including at least one optical diffraction network (7) having a line density higher than 1200 lines/mm and capable of time-stretching the pulse (10) and of inserting a time asymmetry in the stretched pulse (12), an amplification fibre (3) including a doped optical fibre section coupled with an optical pumping means (4) and capable of amplifying the stretched pulse (12) for producing a pulse having a power P, a compressor (6) with an optical diffraction network (8) capable of time-compressing the amplified pulse (14) so that the stretcher (2) and the compressor (6) are misaligned, the misalignment between the stretcher and the compressor being capable of simultaneously compensating second- and third-order nonlinear scattering in the amplification optical fibre (3) during the propagation of the pulse having an initial power P0 through the frequency-drift amplifier.

Classes IPC  ?

• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet
• H01S 3/067 - Lasers à fibre optique

Abrégé

The invention relates to an ultra-short high-power light pulse source including a first laser pump source (1), a mode-locking laser oscillator (2) a second laser pump source (4), a wave guide (6) capable of inserting spectral phases into the light pulses, and a compressor (8) capable of generating predetermined spectral phases into the light pulses. According to the invention, the wave guide (6) comprises a means capable of compensating the predetermined spectral phases generated at least by the compressor (8), the second laser pump source (4) being capable of delivering a second pump light flow (5) having a power PL such that the spectral phases generated by the wave guide (6) are opposed or quasi opposed to the predetermined spectral phases generated by the compressor (8) in order to generate compressed ultra-short light pulses (9) at the output of the compressor (8) with a planar or quasi planar spectral phase.

Classes IPC  ?

• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet

Abrégé

The invention relates to an ultra-short laser source with rare earth ions, comprising a resonant cavity (1) having a first partially-reflective output face (2) and a second reflective face (3). The inventive source also comprises a first active material (4) which receives a pump light flux (6) that is emitted by a first solid laser pump source (7). According to the invention, the optical path length of the resonant cavity (1), which is travelled by the aforementioned pulses, is greater than 7.5 m, such that the energy E¿L? per pulse is greater than 100 nJ, said optical path comprising at least one passage in the active material (4). In addition, the ultra-short laser source comprises means for lengthening the resonant cavity (1), which can be used to extend the optical path length travelled by the light pulses in the resonant cavity (1) of a compact laser source. Moreover, the propagation matrix ABCD of the resonant cavity (1) is similar to the unit matrix, such that the characteristics of the light beam travelling to and fro in the resonant cavity (1) are unchanged.

Classes IPC  ?

• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude