Patents Assigned to Compagnie Industrielle des Lasers Cilas
  • Patent number: 10998691
    Abstract: A method and system for adjusting the profile of a laser wavefront formed by at least a laser beam to a desired laser wavefront profile, the laser beam or beams presenting random phases and intensities, comprises a mixing module, configured to generate, from interference phenomena among the laser beam or beams, a laser field, a second intensity measuring module configured to measure the mixed intensities of the laser field portions, a calculation unit configured to calculate one or several phase correction values of the phase of the laser beam or the phases of laser beams, from the intensities of the laser beams, the mixed intensities and one or several predetermined target phases, and a phase adjustment module configured to apply the phase correction value or values obtained from the calculation unit to the laser beam phases.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: May 4, 2021
    Assignees: COMPAGNIE INDUSTRIELLE DES LASERS CILAS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITÉ DE LIMOGES
    Inventors: Paul Armand, Jérémy Saucourt, Vincent Kermene, Agnès Desfarges-Berthelemot, Joël Benoist, Alain Barthelemy, Julien Leval
  • Patent number: 10983360
    Abstract: An optical device able to change the direction of propagation of a light beam. The optical device allows a wide range of adjustment of the direction of the light beam, said optical device including, in the direction of propagation of the light beam, an overall divergent group of lenses and an overall convergent group of lenses. The overall divergent group of lenses contains, in the direction of propagation of the light beam, a fixed lens, and an optical module comprising at least one movable optical element able to change the direction of propagation of the light beam emerging from the overall divergent group of lenses.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: April 20, 2021
    Assignee: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventor: Régis Grasser
  • Publication number: 20200011973
    Abstract: A system and a method for tracking a target and for compensating for atmospheric turbulence, the system comprising at least two light sources with each emitting a light beam to the target, at least two collimators to collimate the light beam of the associated light source, a reference device to reflect a portion of the light beam exiting from all the collimators, at least two targeting modules to lead the light beam from the light source to reach a predetermined zone of the target, at least two detection modules to receive and detect the portion of the beam reflected by the reference device, a module for determining angle of deviation, a module for determining phase deviation and an adjustment module for adjusting each of the light sources in order to compensate for atmospheric turbulence.
    Type: Application
    Filed: June 27, 2019
    Publication date: January 9, 2020
    Applicant: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventors: Régis Grasser, Marie Naiim-Habib
  • Patent number: 10379367
    Abstract: Optical device for adjusting the spatial distribution of a laser beam. The device (1) comprises an assembly (2) of two matrices (3, 4) of lenses (5a), said matrices (3, 4) being identical and arranged parallel to one another with a uniform spacing between them, said assembly (2) being traversable by a laser beam (6), and controllable activating means (10) capable of modifying the spacing between the two matrices (3, 4) to create a zoom effect.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: August 13, 2019
    Assignee: Compagnie Industrielle des Lasers CILAS
    Inventors: Regis Grasser, Sandrine Cussat-Blanc
  • Patent number: 10367325
    Abstract: An active element slab for a laser source is presented. The active element slab includes at least one input surface of a pump beam, a first section in the shape of an elongated bar along a longitudinal axis that includes a first doped matrix configured to absorb the beam pump to amplify a laser beam travelling longitudinally, a second section that covers at least partially the first section, the second section that includes a second doped matrix configured to absorb the laser beam and of being transparent to the pump beam.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: July 30, 2019
    Assignee: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventors: David Sabourdy, Jean-Eucher Montagne, Alexandre Martins-Santana, Luc Nguyen Duy
  • Publication number: 20190221992
    Abstract: A method and system for adjusting the profile of a laser wavefront formed by at least a laser beam to a desired laser wavefront profile, the laser beam or beams presenting random phases and intensities, comprises a mixing module, configured to generate, from interference phenomena among the laser beam or beams, a laser field, a second intensity measuring module configured to measure the mixed intensities of the laser field portions, a calculation unit configured to calculate one or several phase correction values of the phase of the laser beam or the phases of laser beams, from the intensities of the laser beams, the mixed intensities and one or several predetermined target phases, and a phase adjustment module configured to apply the phase correction value or values obtained from the calculation unit to the laser beam phases.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 18, 2019
    Applicants: COMPAGNIE INDUSTRIELLE DES LASERS CILAS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITÉ DE LIMOGES
    Inventors: Paul Armand, Jérémy Saucourt, Vincent Kermene, Agnès Desfarges-Berthelemot, Joël Benoist, Alain Barthelemy, Julien Leval
  • Publication number: 20180331487
    Abstract: An active element slab for a laser source is presented. The active element slab includes at least one input surface of a pump beam, a first section in the shape of an elongated bar along a longitudinal axis that includes a first doped matrix configured to absorb the beam pump to amplify a laser beam travelling longitudinally, a second section that covers at least partially the first section, the second section that includes a second doped matrix configured to absorb the laser beam and of being transparent to the pump beam.
    Type: Application
    Filed: May 10, 2018
    Publication date: November 15, 2018
    Applicant: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventors: David Sabourdy, Jean-Eucher Montagne, Alexandre Martins-Santana, Luc Nguyen Duy
  • Patent number: 10116114
    Abstract: According to the invention, a plurality of elementary laser beams (fi) are generated, the phases of which are adjusted by an electro-optical feedback loop (6, 7i, 8i, 9) implementing the matrix equation of a phase-contrast filtering device (6).
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: October 30, 2018
    Assignees: COMPAGNIE INDUSTRIELLE DES LASERS CILAS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITE DE LIMOGES
    Inventors: Vincent Kermene, Agnes Desfarges-Berthelemot, Paul Armand, Joel Benoist, David Kabeya, Alain Barthelemy, David Sabourdy, Jean-Eucher Montagne
  • Publication number: 20180284461
    Abstract: An optical device able to change the direction of propagation of a light beam. The optical device allows a wide range of adjustment of the direction of the light beam, said optical device including, in the direction of propagation of the light beam, an overall divergent group of lenses and an overall convergent group of lenses. The overall divergent group of lenses contains, in the direction of propagation of the light beam, a fixed lens, and an optical module comprising at least one movable optical element able to change the direction of propagation of the light beam emerging from the overall divergent group of lenses.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 4, 2018
    Applicant: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventor: Régis Grasser
  • Patent number: 9887512
    Abstract: The invention concerns a laser amplification system comprising a pumping device and at least one thick amplifier disc having a first face, which is reflective at the wavelengths of a pulsed laser beam of the laser amplification system and of a pump beam of the pumping device, as well as at least one heat-dissipation component to which this first face of the amplifier disc is firmly secured, the saturation fluence of the active medium of the amplifier disc being equal to or less than 3 J·cm?2.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: February 6, 2018
    Assignees: COMPAGNIE INDUSTRIELLE DES LASERS CILAS, AIRBUS DEFENCE AND SPACE SAS
    Inventors: Jean-Eucher Montagne, Sandrine Auroux, Bruno Esmiller
  • Patent number: 9819140
    Abstract: The laser cavity is of the unstable type and is provided with a passive Q-switch, the passive Q-switch comprising a saturable absorber that has an absorption gradient, so that the absorption profile of the saturable absorber is inhomogeneous over the cross section of the beam travelling in the laser cavity.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: November 14, 2017
    Assignee: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventor: Jean-Eucher Montagne
  • Patent number: 9405171
    Abstract: The device (1) comprises a controllable illumination module (2) comprising a laser source (3) capable of emitting a laser pulse, a controllable high-speed shutter (5), and an activatable control unit (6) which controls said illumination module (2) and said shutter (5) simultaneously, and which synchronizes the generation of laser pulses by the illumination module (2) and the opening of the shutter (5) so as to move said shutter (5) into an open position, an adjustable time lag after the generation of a laser pulse, and this over an adjustable opening period, said illumination module (2) and said shutter (5) forming part of an assembly (12) having mechanical integrity.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: August 2, 2016
    Assignee: Compagnie Industrielle des Lasers CILAS
    Inventor: Regis Grasser
  • Publication number: 20160118764
    Abstract: The invention concerns a laser amplification system comprising a pumping device and at least one thick amplifier disc having a first face, which is reflective at the wavelengths of a pulsed laser beam of the laser amplification system and of a pump beam of the pumping device, as well as at least one heat-dissipation component to which this first face of the amplifier disc is firmly secured, the saturation fluence of the active medium of the amplifier disc being equal to or less than 3 J·cm?2.
    Type: Application
    Filed: May 20, 2014
    Publication date: April 28, 2016
    Applicants: COMPAGNIE INDUSTRIELLE DES LASERS CILAS, AIRBUS DEFENCE AND SPACE SAS
    Inventors: Jean-Eucher Montagne, Sandrine Auroux, Bruno Esmiller
  • Patent number: 9166359
    Abstract: Method and laser oscillator for the generation of a laser beam—According to the invention with a view to adjusting, inside said laser oscillator (1), the phase of each of the N elementary laser beams (FLE.1, FLE.2, FLE.N) generated on the basis of said laser oscillator (1) in such a way that said elementary laser beams are in phase, the deviation between the phase of an individual elementary laser beam (FLE.1) and the phases of the N?1 other elementary laser beams (FLE.2, FLE.N) is converted into a level of luminous intensity by means of at least one optical filtering element to which at least a part of each elementary laser beam is directed.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: October 20, 2015
    Assignee: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventors: David Sabourdy, Jean-Eucher Montagne, Alain Barthelemy, Agnès Desfarges-Berthellemot, Vincent Kermene, Julien Guillot, Brigitte Serreault, Bruno Esmiller
  • Publication number: 20150280392
    Abstract: The laser cavity is of the unstable type and is provided with a passive Q-switch, the passive Q-switch comprising a saturable absorber that has an absorption gradient, so that the absorption profile of the saturable absorber is inhomogeneous over the cross section of the beam travelling in the laser cavity.
    Type: Application
    Filed: March 27, 2015
    Publication date: October 1, 2015
    Applicant: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventor: JEAN-EUCHER MONTAGNE
  • Patent number: 8913645
    Abstract: The invention relates to a laser cavity with central extraction by polarisation for coherent coupling of intense intra-cavity beams. The laser cavity (1) according to the invention comprises an extraction unit (7) with central extraction, which divides the laser cavity (1) longitudinally into two functional portions (P1, P2), namely a first portion (P1) including the active components (3), which amplifies the laser beams (4), and a second portion (P2) which performs coherent coupling of the laser beams (4).
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: December 16, 2014
    Assignees: Compagnie Industrielle des Laser CILAS, Astrium SAS
    Inventors: David Sabourdy, Jean-Eucher Montagne, Alain Barthelemy, Agnes Desfarges-Berthelemot, Vincent Kermene, Sandrine Auroux, Julien Guillot, Brigitte Serreault, Bruno Esmiller
  • Publication number: 20140340471
    Abstract: Optical device for adjusting the spatial distribution of a laser beam. The device (1) comprises an assembly (2) of two matrices (3, 4) of lenses (5a), said matrices (3, 4) being identical and arranged parallel to one another with a uniform spacing between them, said assembly (2) being traversable by a laser beam (6), and controllable activating means (10) capable of modifying the spacing between the two matrices (3, 4) to create a zoom effect.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Applicant: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventors: Regis GRASSER, Sandrine CUSSAT-BLANC
  • Publication number: 20140341555
    Abstract: The device (1) comprises a controllable illumination module (2) comprising a laser source (3) capable of emitting a laser pulse, a controllable high-speed shutter (5), and an activatable control unit (6) which controls said illumination module (2) and said shutter (5) simultaneously, and which synchronises the generation of laser pulses by the illumination module (2) and the opening of the shutter (5) so as to move said shutter (5) into an open position, an adjustable time lag after the generation of a laser pulse, and this over an adjustable opening period, said illumination module (2) and said shutter (5) forming part of an assembly (12) having mechanical integrity.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Applicant: COMPAGNIE INDUSTRIELLE DES LASERS CILAS
    Inventor: Regis GRASSER
  • Publication number: 20140340514
    Abstract: The system (1) has at least one Fabry-Pérot cavity (3) with an adjustable gap (E), of which a gap value known as the nominal value allows a laser beam (4) of corresponding frequency to pass through said Fabry-Pérot cavity (3), controllable piezoelectric actuation means (5A), capable of causing said gap (E) to vary, within a range of gap values including said nominal value, and a control unit (6) to control said actuation means (5A) so that it causes the gap (E) to vary in accordance with a periodic time function.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Applicant: Compagnie Industrielle des Lasers CILAS
    Inventors: Regis GRASSER, Aurelien MOREAU
  • Patent number: 8867576
    Abstract: A laser system having a cavity formed by at least two sub-cavities and a mechanism for optically pumping a first of the at least two sub-cavities. In the system, the optical pumping mechanism is arranged in such away to not reach a laser emission threshold of the first sub-cavity, the first sub-cavity (2) comprising a device for generating a short pulse, a second sub-cavity (3) comprising an external triggering device. The first and second sub-cavities are coupled such that the triggering of the second sub-cavity has at least two such laser systems, to a light emission system with a wide spectral band, comprising such a laser system and a mechanism for generating non-linear optical effects inserted into the second sub-cavity, and to a light generator with a wide spectral band, comprising such a laser generator having at least one laser system provided with a mechanism for generating non-linear optical effects inserted into the second sub-cavity.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: October 21, 2014
    Assignees: Centre National de la Recherche Scientifique-CNRS, Compagnie Industrielle des Lasers Cilas (CILAS)
    Inventors: Vincent Couderc, Philippe Paul Leproux, Florent Doutre, Dominique Pagnoux