Patents by Inventor Stéphanie Molin
Stéphanie Molin 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).
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Patent number: 11175193Abstract: 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 dType: GrantFiled: March 17, 2016Date of Patent: November 16, 2021Assignees: THALES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE NICE SOPHIA-ANTIPOLISInventors: Stéphanie Molin, Martine Doisy, Arnaud Peigne, Stefania Residori, Umberto Bortolozzo, Jean-Pierre Huignard, Renaud Bouffaron, Daniel Dolfi
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Patent number: 10126163Abstract: 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 theType: GrantFiled: January 8, 2016Date of Patent: November 13, 2018Assignees: THALES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE NICE SOPHIA-ANTIPOLISInventors: Jean-Pierre Huignard, Umberto Bortolozzo, Daniel Dolfi, Stéphanie Molin, Arnaud Peigne, Stefania Residori
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Publication number: 20180058956Abstract: 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 dType: ApplicationFiled: March 17, 2016Publication date: March 1, 2018Inventors: Stéphanie MOLIN, Martine DOISY, Arnaud PEIGNE, Stefania RESIDORI, Umberto BORTOLOZZO, Jean-Pierre HUIGNARD, Renaud BOUFFARON, Daniel DOLFI
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Publication number: 20180003551Abstract: 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 theType: ApplicationFiled: January 8, 2016Publication date: January 4, 2018Inventors: Jean-Pierre HUIGNARD, Umberto BORTOLOZZO, Daniel DOLFI, Stéphanie MOLIN, Arnaud PEIGNE, Stefania RESIDORI
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Patent number: 9791302Abstract: 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: GrantFiled: November 14, 2014Date of Patent: October 17, 2017Assignees: THALES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)Inventors: Umberto Bortolozzo, Jean-Pierre Huignard, Stefania Residori, Stéphanie Molin, Daniel Dolfi
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Publication number: 20160282150Abstract: 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: ApplicationFiled: November 14, 2014Publication date: September 29, 2016Inventors: Umberto BORTOLOZZO, Jean-Pierre HUIGNARD, Stefania RESIDORI, Stéphanie MOLIN, Daniel DOLFI
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Patent number: 8451453Abstract: 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: GrantFiled: February 27, 2008Date of Patent: May 28, 2013Assignee: ThalesInventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy
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Patent number: 8290316Abstract: 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: GrantFiled: March 16, 2009Date of Patent: October 16, 2012Assignee: ThalesInventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy, Loïc Morvan, Jean-Paul Pocholle
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Publication number: 20110122417Abstract: 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: ApplicationFiled: June 25, 2009Publication date: May 26, 2011Applicant: THALESInventors: Stéphanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Jean-Paul Pocholle, Martine Doisy
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Publication number: 20110019179Abstract: 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: ApplicationFiled: March 16, 2009Publication date: January 27, 2011Applicant: THALESInventors: Stephanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy, Loic Morvan, Jean-Paul Pocholle
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Publication number: 20100039650Abstract: 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: ApplicationFiled: February 27, 2008Publication date: February 18, 2010Applicant: ThalesInventors: Stephanie Molin, Daniel Dolfi, Jean-Pierre Huignard, Martine Doisy