Patents by Inventor Jean Pierre Huignard

Jean Pierre Huignard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10126163
    Abstract: A fiber optic sensor for detecting an excitation in proximity to a fiber optic assembly, the excitation inducing a modulation of the phase of an optical signal propagating in the fiber optic assembly, the sensor comprises: a laser assembly emitting at least one laser beam; a fiber optic assembly; an optical system configured to: inject at least one portion of the laser beam; generate at least one laser signal beam issued from the laser beam injected into and propagated in the fiber assembly; generate at least one reference beam from the laser beam or the signal beam; produce at least one interference zone corresponding to the interference between a portion of the reference beam and a portion of the interference signal beam corresponding to the interference between a portion of the reference beam and a portion of the signal beam; a digital holography assembly comprising: a liquid-crystal spatial light modulator; a video camera configured to receive the interference zone and to transcribe it electrically to the
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: November 13, 2018
    Assignees: THALES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE NICE SOPHIA-ANTIPOLIS
    Inventors: Jean-Pierre Huignard, Umberto Bortolozzo, Daniel Dolfi, Stéphanie Molin, Arnaud Peigne, Stefania Residori
  • Publication number: 20180058956
    Abstract: A distributed optical fiber sensor of dynamic stress state comprises: an optical assembly configured to generate a series of optical pulses; an optical fiber of optical length L; an optical system configured to: inject through the first end at least the series of optical pulses; receive at the level of the end at least one series of output optical pulses, arising from the input pulses after propagation and retro-propagation in the fiber; generate at least one continuous reference beam or reference optical pulses on the basis of the optical assembly or of output optical pulses; produce a series of interference zones corresponding to the interference between the reference beam or a reference pulse and a signal optical pulse arising from an output optical pulse; a holographic detector comprising: a liquid-crystal light valve, the valve disposed so that it at least partially covers the interference zones, and producing holograms on the basis of the interference zones; at least one optical detector configured to d
    Type: Application
    Filed: March 17, 2016
    Publication date: March 1, 2018
    Inventors: Stéphanie MOLIN, Martine DOISY, Arnaud PEIGNE, Stefania RESIDORI, Umberto BORTOLOZZO, Jean-Pierre HUIGNARD, Renaud BOUFFARON, Daniel DOLFI
  • Publication number: 20180003551
    Abstract: A fiber optic sensor for detecting an excitation in proximity to a fiber optic assembly, the excitation inducing a modulation of the phase of an optical signal propagating in the fiber optic assembly, the sensor comprises: a laser assembly emitting at least one laser beam; a fiber optic assembly; an optical system configured to: inject at least one portion of the laser beam; generate at least one laser signal beam issued from the laser beam injected into and propagated in the fiber assembly; generate at least one reference beam from the laser beam or the signal beam; produce at least one interference zone corresponding to the interference between a portion of the reference beam and a portion of the interference signal beam corresponding to the interference between a portion of the reference beam and a portion of the signal beam; a digital holography assembly comprising: a liquid-crystal spatial light modulator; a video camera configured to receive the interference zone and to transcribe it electrically to the
    Type: Application
    Filed: January 8, 2016
    Publication date: January 4, 2018
    Inventors: Jean-Pierre HUIGNARD, Umberto BORTOLOZZO, Daniel DOLFI, Stéphanie MOLIN, Arnaud PEIGNE, Stefania RESIDORI
  • Patent number: 9791302
    Abstract: An optical fiber sensor for locating an excitation in proximity to an optical fiber assembly comprises: a laser assembly configured to emit N laser beams indexed i with N>1, of respective emission wavelength ?i, an optical fiber assembly comprising N successive sections indexed i, an optical system configured to: inject the laser beams, receive N signal beams indexed i respectively of wavelengths ?i, generate N reference beams indexed i respectively of wavelengths ?i, produce N interference areas indexed i, a holographic detector comprising: a liquid crystal light valve that at least partially covers the interference areas, and is configured to produce N holograms indexed i from, respectively, N interference areas, at least one optical detector configured to detect N output optical signals indexed I, a processing unit adapted to identify the section of the fiber assembly situated in proximity to the excitation to be located.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: October 17, 2017
    Assignees: THALES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
    Inventors: Umberto Bortolozzo, Jean-Pierre Huignard, Stefania Residori, Stéphanie Molin, Daniel Dolfi
  • Publication number: 20160282150
    Abstract: An optical fiber sensor for locating an excitation in proximity to an optical fiber assembly comprises: a laser assembly configured to emit N laser beams indexed i with N>1, of respective emission wavelength ?i, an optical fiber assembly comprising N successive sections indexed i, an optical system configured to: inject the laser beams, receive N signal beams indexed i respectively of wavelengths ?i, generate N reference beams indexed i respectively of wavelengths ?i, produce N interference areas indexed i, a holographic detector comprising: a liquid crystal light valve that it at least partially covers the interference areas, and is configured to produce N holograms indexed i from, respectively, N interference areas, at least one optical detector configured to detect N output optical signals indexed I, a processing unit adapted to identify the section of the fiber assembly situated in proximity to the excitation to be located.
    Type: Application
    Filed: November 14, 2014
    Publication date: September 29, 2016
    Inventors: Umberto BORTOLOZZO, Jean-Pierre HUIGNARD, Stefania RESIDORI, Stéphanie MOLIN, Daniel DOLFI
  • Publication number: 20160143542
    Abstract: An endoscopic device for photoacoustic imaging, including a multimode optical fiber having a distal end and a proximal end, a light source to provide a light beam to the proximal end of the multimode optical fiber, a transducer to capture acoustic waves that are emitted from the proximal end of the multimode optical fiber, and a processing device to generate a photoacoustic image based on data from the captured acoustic waves captured by the transducer, wherein the distal end of the multimode optical fiber is configured to be inserted into a sample, the sample generating the acoustic waves by a photoacoustic effect.
    Type: Application
    Filed: November 23, 2015
    Publication date: May 26, 2016
    Inventors: Emmanuel Bossy, Jean-Pierre Huignard, Olivier Simandoux, Christophe Moser, Demetri Psaltis, Ioannis Papadopoulos, Nicolino Stasio, Salma Farahi
  • Patent number: 8767289
    Abstract: The invention relates to a laser device comprising a number of fiber amplifiers (3) delivering a number of optical waves, which is supplied by an oscillator (1) that delivers a signal wave, characterized in that said device comprises: a coherent source (4) emitting a coherent wave at a wavelength approximately equal to that of the signal wave and the propagation direction of which is inclined to the propagation direction of the optical waves output by the fiber amplifiers; means for making the coherent wave interfere with the optical waves output by the fiber amplifiers, and generating an interferogram consisting of an array of fringes; interferogram detection means (7), the relative positions of the fringes transcribing an inter-fiber phase law; a spatial phase modulator (2); and processing/display means (6) for processing the detected phase law and for displaying it on the spatial modulator, said spatial modulator being positioned so as to be able to be read by the signal wave and thus generate a phase-m
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: July 1, 2014
    Assignee: Thales
    Inventors: Jean-Pierre Huignard, Cindy Bellanger, Arnaud Brignon, Joseph Colineau
  • Patent number: 8451453
    Abstract: The subject of the present invention is a dynamic sensor of physical quantities with optical waveguide with optically-pumped amplifier medium, which requires no interferometer or reference sensor and which makes it possible to obtain at least the same level of performance, in terms of sensitivity, as known sensors of this type, and this waveguide is linked at one end to a selective mirror, and comprises at its other end an interrogation laser, the reflection of which on the selective mirror produces a wave which, by interference with the incident wave, provokes the periodic saturation of the gain of the waveguide.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: May 28, 2013
    Assignee: Thales
    Inventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy
  • Patent number: 8290316
    Abstract: The general field of the invention is that of fiber-optic sensors comprising at least one measurement optical fiber having an optically pumped doped amplifying medium, the optical characteristics of which are sensitive to a physical quantity, the fiber having at least one Bragg grating. The fiber is designed so as to generate, in the amplifying medium, two optical waves having different optical frequencies that propagate in the same direction after reflection on the Bragg grating and are emitted by the amplifying medium, the two optical frequencies depending on the physical quantity. The two waves may be generated using either a birefringent polarization-maintaining fiber or a DBR (Distributed Bragg Reflector) laser cavity. Notably, this sensor may be used as a hydrophone.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 16, 2012
    Assignee: Thales
    Inventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy, Loïc Morvan, Jean-Paul Pocholle
  • Publication number: 20110122417
    Abstract: A sensor is used to measure a physical quantity and includes at least: a measurement optical fiber including at least one Bragg grating; optical means designed to inject, into the fiber, a first, “pump” wave at a first optical frequency and a second, “probe” wave at a second optical frequency, the second optical frequency being different from the first optical frequency, the Bragg grating being designed to reflect the first and second optical waves, and the optical power of the first wave being sufficient to give, after interaction with the second wave reflected by stimulated Brillouin scattering, a “Stokes” wave, the frequency of which is representative of the physical quantity to be measured; and means for analyzing the difference in frequency between the two, “pump” and “Stokes”, optical waves. The sensor may notably be used as a hydrophone.
    Type: Application
    Filed: June 25, 2009
    Publication date: May 26, 2011
    Applicant: THALES
    Inventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Jean-Paul Pocholle, Martine Doisy
  • Publication number: 20110019179
    Abstract: The general field of the invention is that of fiber-optic sensors comprising at least one measurement optical fiber having an optically pumped doped amplifying medium, the optical characteristics of which are sensitive to a physical quantity, the fiber having at least one Bragg grating. The fiber is designed so as to generate, in the amplifying medium, two optical waves having different optical frequencies that propagate in the same direction after reflection on the Bragg grating and are emitted by the amplifying medium, the two optical frequencies depending on the physical quantity. The two waves may be generated using either a birefringent polarization-maintaining fiber or a DBR (Distributed Bragg Reflector) laser cavity. Notably, this sensor may be used as a hydrophone.
    Type: Application
    Filed: March 16, 2009
    Publication date: January 27, 2011
    Applicant: THALES
    Inventors: Stephanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy, Loic Morvan, Jean-Paul Pocholle
  • Patent number: 7852888
    Abstract: A laser source is disclosed with coherent recombination of N spatial monomode laser beams having N phase shifters controlled by a phase-lock device (3). The phase-lock device has an optical device (30) capable of taking at least a portion of each of the N beams. The optical device has an optical element (32) capable of applying a phase deformation, and at least one matrix (M1) of detectors capable of detecting a first image (im) of a wave surface corresponding to the N beams. The matrix (M1) of detectors also detects a second image (imd) deformed by the optical element (32). Processing means (31) are provided for processing the first and second images. The processing means are configured so as to measure the phase pistons between on the sub-pupils (spj) corresponding to the N beams and to apply phase corrections c(?) to each of the N beams, by means of said N phase shifters so as to minimize the phase pistons.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: December 14, 2010
    Assignee: Thales
    Inventors: Sebastien Demoustier, Amaud Brignon, Jean-Pierre Huignard, Laurent Mugnier, Jerome Primot
  • Publication number: 20100142574
    Abstract: A laser source is disclosed with coherent recombination of N spatial monomode laser beams having N phase shifters controlled by a phase-lock device (3). The phase-lock device has an optical device (30) capable of taking at least a portion of each of the N beams. The optical device has an optical element (32) capable of applying a phase deformation, and at least one matrix (M1) of detectors capable of detecting a first image (im) of a wave surface corresponding to the N beams. The matrix (M1) of detectors also detects a second image (imd) deformed by the optical element (32). Processing means (31) are provided for processing the first and second images. The processing means are configured so as to measure the phase pistons between on the sub-pupils (spj) corresponding to the N beams and to apply phase corrections c(?) to each of the N beams, by means of said N phase shifters so as to minimize the phase pistons.
    Type: Application
    Filed: August 10, 2006
    Publication date: June 10, 2010
    Applicant: Thales
    Inventors: Sebastien Demoustier, Arnaud Brignon, Jean-Pierre Huignard, Laurent Mugnier, Jerome Primot
  • Publication number: 20100039650
    Abstract: The subject of the present invention is a dynamic sensor of physical quantities with optical waveguide with optically-pumped amplifier medium, which requires no interferometer or reference sensor and which makes it possible to obtain at least the same level of performance, in terms of sensitivity, as known sensors of this type, and this waveguide is linked at one end to a selective mirror, and comprises at its other end an interrogation laser, the reflection of which on the selective mirror produces a wave which, by interference with the incident wave, provokes the periodic saturation of the gain of the waveguide.
    Type: Application
    Filed: February 27, 2008
    Publication date: February 18, 2010
    Applicant: Thales
    Inventors: Stephanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy
  • Publication number: 20090316734
    Abstract: The invention relates to a laser device comprising a number of fibre amplifiers (3) delivering a number of optical waves, which is supplied by an oscillator (1) that delivers a signal wave, characterized in that said device comprises: a coherent source (4) emitting a coherent wave at a wavelength approximately equal to that of the signal wave and the propagation direction of which is inclined to the propagation direction of the optical waves output by the fibre amplifiers; means for making the coherent wave interfere with the optical waves output by the fibre amplifiers, and generating an interferogram consisting of an array of fringes; interferogram detection means (7), the relative positions of the fringes transcribing an inter-fibre phase law; a spatial phase modulator (2); and processing/display means (6) for processing the detected phase law and for displaying it on the spatial modulator, said spatial modulator being positioned so as to be able to be read by the signal wave and thus generate a phase-m
    Type: Application
    Filed: June 18, 2009
    Publication date: December 24, 2009
    Applicant: Thales
    Inventors: Jean-Pierre Huignard, Cindy Bellanger, Arnaud Brignon, Joseph Colineau
  • Patent number: 7489404
    Abstract: An fiber-optic interferometric rotation sensor device has a laser source combined with an optical fiber. These are configured to cause interference between a beam from the laser source and a beam coming from the optical fiber. The laser source includes an optical cavity having a gain lasing medium. The sensor device includes, along the path of the beam output by the laser cavity, a beam splitter device associated with a mirror, wherein the beam split off from the beam output by the laser cavity is sent into one of the ends of the optical fiber and directed from the other end toward the gain lasing medium to form a nonlinear mirror. The splitter device is followed by a detector.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: February 10, 2009
    Assignee: Thales
    Inventors: Jean-Pierre Huignard, Arnaud Brignon
  • Publication number: 20070052969
    Abstract: The fiber-optic interferometric rotation sensor device of the invention comprises a laser source combined with an optical fiber and with a device for making the beam from the laser source interfere with the beam coming from the optical fiber, and, according to one feature of the invention, the laser source is an optical cavity having a gain lasing medium and the device includes, along the path of the beam output by the laser cavity, a beam splitter device associated with a mirror, the beam split off from the beam output by the laser cavity being sent into one of the ends of the optical fiber, the other end of which is directed toward the gain lasing medium that forms a nonlinear mirror, the splitter device being followed by a detector.
    Type: Application
    Filed: August 25, 2004
    Publication date: March 8, 2007
    Applicant: THALES
    Inventors: Jean-Pierre Huignard, Arnaud Brignon
  • Patent number: 6834061
    Abstract: A pumped-fiber laser comprising a multimode doped fiber (1) and a holographic spatial mode conversion device (3).
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: December 21, 2004
    Assignee: Thales
    Inventors: Jean-Pierre Huignard, Arnaud Brignon
  • Publication number: 20040233940
    Abstract: A pumped-fiber laser comprising a multimode doped fiber (1) and a holographic spatial mode conversion device (3).
    Type: Application
    Filed: March 6, 2002
    Publication date: November 25, 2004
    Inventors: Jean-Pierre Huignard, Arnaud Brignon
  • Publication number: 20040047533
    Abstract: The device of the invention essentially comprises a plate (6) of electrooptic material, for example PLZT, on which four electrodes (7 to 10) are printed. The electric field produced by applying voltages (V1 to V4) to these electrodes creates a rotating-axis phase plate.
    Type: Application
    Filed: June 25, 2003
    Publication date: March 11, 2004
    Inventor: Jean-Pierre Huignard