Patents by Inventor Laurent Duraffourg
Laurent Duraffourg 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: 11906422Abstract: The invention relates to a device for detecting a gaseous species by photoacoustic effect. The device comprises a substrate, inside which a cavity is formed. A light source is disposed on the substrate, in such a way that a part of the substrate extends between the light source and the cavity. The device is arranged in such a way that the light, emitted by the light source, is propagated through the substrate, before reaching the cavity.Type: GrantFiled: November 25, 2022Date of Patent: February 20, 2024Assignee: Commissariat à l'Energie Atomique et aux Energies AlternativesInventors: Emmanuel Ollier, Caroline Coutier, Laurent Duraffourg, Thierry Verdot
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Patent number: 11674931Abstract: Photoacoustic detecting device (1), intended to be applied, via a contact face (3), against a medium to be analysed, the device comprising: a hollow cavity (20) comprising a first aperture (22) produced in the contact face, the cavity being bounded by a containment shell (21) that extends around the first aperture; a pulsed or amplitude-modulated light source (10) configured to emit, in an emission spectral band (??), an incident light wave (11) through the cavity (20) to the first aperture; an acoustic transducer (28) linked to the cavity and configured to detect a photoacoustic wave (12) extending through the cavity. The photoacoustic detecting device is optimized to increase the amplitude of the photoacoustic wave detected by the acoustic transducer.Type: GrantFiled: March 23, 2021Date of Patent: June 13, 2023Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Jean-Guillaume Coutard, Laurent Duraffourg, Alain Gliere, Alexandre Teulle
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Publication number: 20230168183Abstract: The invention relates to a device for detecting a gaseous species by photoacoustic effect. The device comprises a substrate, inside which a cavity is formed. A light source is disposed on the substrate, in such a way that a part of the substrate extends between the light source and the cavity. The device is arranged in such a way that the light, emitted by the light source, is propagated through the substrate, before reaching the cavity.Type: ApplicationFiled: November 25, 2022Publication date: June 1, 2023Applicant: Commissariat à l'Energie Atomique et aux Energies AlternativesInventors: Emmanuel OLLIER, Caroline COUTIER, Laurent DURAFFOURG, Thierry VERDOT
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Patent number: 11464670Abstract: The invention relates to a device for cooling an organ locally, that includes an elongate stem including a far end intended to make contact with an organ to be cooled and comprising including a cooling element having a cold finger, a crystal that has a capacity to cool via excitation at a set excitation wavelength, said crystal being positioned adjacent to said cooling element, an optical guide that is able to convey a light signal at said excitation wavelength and that opens onto said crystal, and an illuminating system including at least one light source, which light source is arranged to emit said light signal.Type: GrantFiled: September 12, 2017Date of Patent: October 11, 2022Assignees: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, UNIVERSITE GRENOBLE ALPES, CENTRE HOSPITALIER UNIVERSITAIRE GRENOBLE ALPESInventors: Nicolas Aubert, Claude Chabrol, Stephan Chabardes, Laurent Duraffourg
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Publication number: 20210302387Abstract: Photoacoustic detecting device (1), intended to be applied, via a contact face (3), against a medium to be analysed, the device comprising: a hollow cavity (20) comprising a first aperture (22) produced in the contact face, the cavity being bounded by a containment shell (21) that extends around the first aperture; a pulsed or amplitude-modulated light source (10) configured to emit, in an emission spectral band (??), an incident light wave (11) through the cavity (20) to the first aperture; an acoustic transducer (28) linked to the cavity and configured to detect a photoacoustic wave (12) extending through the cavity. The photoacoustic detecting device is optimized to increase the amplitude of the photoacoustic wave detected by the acoustic transducer.Type: ApplicationFiled: March 23, 2021Publication date: September 30, 2021Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Jean-Guillaume COUTARD, Laurent DURAFFOURG, Alain GLIERE, Alexandre TEULLE
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Patent number: 11073412Abstract: An opto-mechanical resonator including a waveguide formed by a plurality of first strips spaced apart from one another; and two mirrors disposed facing one another, which mirrors are optically reflective over at least part of a guide wavelength range of the waveguide. The waveguide extends between the two mirrors, and forms therewith an optically resonant cavity. At least part of the waveguide is held such that it is suspended over a substrate by at least one deformable mechanical element.Type: GrantFiled: October 25, 2019Date of Patent: July 27, 2021Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Boris Taurel, Laurent Duraffourg, Pierre Labeye
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Patent number: 10866214Abstract: An element of a photoacoustic sensor combines an optomechanical resonator and a photoacoustic cavity. The photoacoustic cavity is formed by a measurement chamber, traversed by a pulsed excitation beam. The optomechanical resonator is formed by an optical resonator, a mechanical element for being set in rapid oscillations, by an optical signal confined in the optomechanical resonator, and in slow oscillations, by an acoustic wave generated in the photoacoustic cavity. A measurement beam is sent into the optical resonator, where it carries out several passages via the mechanical element. The optical properties thereof at the output of the optical resonator are therefore dependent on the oscillations of the mechanical element. A low-frequency-amplitude-modulated high-frequency signal can be obtained, with the amplitude modulation representing the acoustic wave in the measurement chamber. An accurate, low-noise, and highly compact method is enabled for making measurements with a photoacoustic effect.Type: GrantFiled: February 13, 2019Date of Patent: December 15, 2020Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Laurent Duraffourg, Pierre Labeye, Boris Taurel
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Patent number: 10845242Abstract: A measuring device includes a first light source for emitting an excitation beam at an excitation wavelength; and an excitation optical cavity, optically resonant at the excitation wavelength, and arranged such that it receives the excitation beam; a second light source for emitting a measurement beam at a measurement wavelength; and a mechanical element mounted such that it can move about an elastic recovery position and/or such that it is elastically deformable, located both on the optical path of the excitation beam in the excitation optical cavity and on the optical path of the measurement beam, and capable of being displaced and/or deformed by the excitation beam. One of either the excitation beam or the measurement beam is capable of causing the movable and/or deformable mechanical element to oscillate. The measuring device can in particular be used as a gas sensor or as a mass spectrometer.Type: GrantFiled: November 5, 2019Date of Patent: November 24, 2020Assignee: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Laurent Duraffourg, Jean-Marc Fedeli, Serge Gidon, Pierre Labeye
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Patent number: 10788687Abstract: An optomechanical system including a guide structure, to guide a light beam; and two waveguide segments. Each guide structure include beams that together form two combs partially nested one in the other. At least one beam is free to move in translation along an axis orthogonal to the long axis of the guide structure. A displacement into an optical phase shift, while limiting additional effects on the intensity.Type: GrantFiled: November 16, 2018Date of Patent: September 29, 2020Assignee: COMMISSARIAT A L'ENERGIES ALTERNATIVESInventors: Boris Taurel, Laurent Duraffourg, Pierre Labeye
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Publication number: 20200182659Abstract: An opto-mechanical resonator including a waveguide formed by a plurality of first strips spaced apart from one another; and two mirrors disposed facing one another, which mirrors are optically reflective over at least part of a guide wavelength range of the waveguide. The waveguide extends between the two mirrors, and forms therewith an optically resonant cavity. At least part of the waveguide is held such that it is suspended over a substrate by at least one deformable mechanical element.Type: ApplicationFiled: October 25, 2019Publication date: June 11, 2020Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Boris TAUREL, Laurent DURAFFOURG, Pierre LABEYE
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Publication number: 20200141805Abstract: A measuring device includes a first light source for emitting an excitation beam at an excitation wavelength; and an excitation optical cavity, optically resonant at the excitation wavelength, and arranged such that it receives the excitation beam; a second light source for emitting a measurement beam at a measurement wavelength; and a mechanical element mounted such that it can move about an elastic recovery position and/or such that it is elastically deformable, located both on the optical path of the excitation beam in the excitation optical cavity and on the optical path of the measurement beam, and capable of being displaced and/or deformed by the excitation beam. One of either the excitation beam or the measurement beam is capable of causing the movable and/or deformable mechanical element to oscillate. The measuring device can in particular be used as a gas sensor or as a mass spectrometer.Type: ApplicationFiled: November 5, 2019Publication date: May 7, 2020Applicant: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Laurent DURAFFOURG, Jean-Marc Fedeli, Serge Gidon, Pierre Labeye
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Patent number: 10578437Abstract: An optical sensor includes an optical device including a microresonator, laid out to guide a light beam along a closed loop optical path, and an injection and/or extraction waveguide, optically coupled to the microresonator; a photodetector, arranged at the output of the injection and/or extraction waveguide; and an analysis device, receiving a signal supplied by the photodetector, and deducing therefrom information relative to a displacement. The microresonator is constituted of a plurality of elementary waveguides spaced apart from each other, and arranged one after the other according to a loop shaped layout. The optical sensor offers increased sensitivity to the measurement of nanometric displacements.Type: GrantFiled: July 3, 2018Date of Patent: March 3, 2020Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Boris Taurel, Salim Boutami, Laurent Duraffourg
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Patent number: 10551333Abstract: A heat flux sensor including at least one optical resonator, suspended on a support, the optical resonator intended to be suspended in a gaseous environment, at least one first device intended to introduce a measurement light beam into the waveguide, at least one second collection device, intended to collect a detection light beam coming from the optical resonator and a device for heating of the optical resonator.Type: GrantFiled: August 24, 2016Date of Patent: February 4, 2020Assignee: Commissariat a L'Energie Atomique et aux Energies AlternativesInventor: Laurent Duraffourg
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Patent number: 10395907Abstract: A generator of an ion beam is provided, including an ionization chamber provided with an inlet of a fluid to be ionized; a source of ionizing particles configured to impact the fluid in an impact zone of the ionization chamber so as to generate ions; and an extractor of ions generated in a direction of an outlet zone of the generator, the extractor including at least two electrodes, a first electrode referred to as input electrode laterally bordering the impact zone, and at least one second electrode referred to as intermediate electrode located in the impact zone, the at least two electrodes being configured to generate a voltage gradient in the impact zone, with the voltage gradient being configured to direct the generated ions to the outlet zone of the generator.Type: GrantFiled: February 23, 2018Date of Patent: August 27, 2019Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Thomas Alava, Hadley Videlier, Frederic Progent, Laurent Duraffourg, Sebastien Vigne, Romain Mahieu
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Publication number: 20190257796Abstract: An element of a photoacoustic sensor combines an optomechanical resonator and a photoacoustic cavity. The photoacoustic cavity is formed by a measurement chamber, traversed by a pulsed excitation beam. The optomechanical resonator is formed by an optical resonator, a mechanical element for being set in rapid oscillations, by an optical signal confined in the optomechanical resonator, and in slow oscillations, by an acoustic wave generated in the photoacoustic cavity. A measurement beam is sent into the optical resonator, where it carries out several passages via the mechanical element. The optical properties thereof at the output of the optical resonator are therefore dependent on the oscillations of the mechanical element. A low-frequency-amplitude-modulated high-frequency signal can be obtained, with the amplitude modulation representing the acoustic wave in the measurement chamber. An accurate, low-noise, and highly compact method is enabled for making measurements with a photoacoustic effect.Type: ApplicationFiled: February 13, 2019Publication date: August 22, 2019Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Laurent DURAFFOURG, Pierre LABEYE, Boris TAUREL
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Publication number: 20190155065Abstract: An optomechanical system including a guide structure, to guide a light beam; and two waveguide segments. Each guide structure include beams that together form two combs partially nested one in the other. At least one beam is free to move in translation along an axis orthogonal to the long axis of the guide structure. A displacement into an optical phase shift, while limiting additional effects on the intensity.Type: ApplicationFiled: November 16, 2018Publication date: May 23, 2019Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Boris TAUREL, Laurent Duraffourg, Pierre Labeye
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Patent number: 10254304Abstract: A physical sensor comprising a substrate, a movable mass, said mass being able to be moved by an external force, a first optical resonator, a light wave guide for measurement and a light wave guide for detection, a rigid plate which are able to modify the optical resonance frequency of said optical resonator by moving closer and away the same, a lever arm rotatably hinged to the substrate by a pivot connection and the mass being movably integral with the transmitting means, the rigid plate being disposed relative to the mass and to the pivot connection such that the lever arm transmits to the rigid plate, in an amplified manner, the displacement of the mass.Type: GrantFiled: September 23, 2016Date of Patent: April 9, 2019Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Laurent Duraffourg
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Patent number: 10216698Abstract: A device for analyzing a fluid, including a layer including a plurality of sensors of MEMS and/or NEMS type, a layer including a mechanism controlling the sensor and for processing information transmitted by the sensors, the control and processing mechanism being electrically connected to the detectors, and a layer positioned on the layer including the sensors on a side of a face including the sensors including a mechanism spatially and temporally distributing the fluid on the sensors.Type: GrantFiled: June 6, 2011Date of Patent: February 26, 2019Assignees: Commissariat à l 'Energie Atomique et aux Energies Alternatives, California Institute of TechnologyInventors: Thomas Ernst, Philippe Andreucci, Eric Colinet, Laurent Duraffourg, Edward B. Myers, Michael L. Roukes
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Publication number: 20190011261Abstract: An optical sensor includes an optical device including a microresonator, laid out to guide a light beam along a closed loop optical path, and an injection and/or extraction waveguide, optically coupled to the microresonator; a photodetector, arranged at the output of the injection and/or extraction waveguide; and an analysis device, receiving a signal supplied by the photodetector, and deducing therefrom information relative to a displacement. The microresonator is constituted of a plurality of elementary waveguides spaced apart from each other, and arranged one after the other according to a loop shaped layout. The optical sensor offers increased sensitivity to the measurement of nanometric displacements.Type: ApplicationFiled: July 3, 2018Publication date: January 10, 2019Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Boris TAUREL, Salim Boutami, Laurent Duraffourg
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Patent number: 10175212Abstract: A gas analysis system includes a fluidic channel for flow of a gas to be analyzed, a detector in the channel and adapted for measuring interactions of the gas with the detector, the detector including a resonator of the electromechanical nanosystem (NEMS) type and a heating system for heating a part of the detector, an actuation device for vibrationally actuating the resonator according to an excitation signal applied to an input of the detector, a detection device adapted for providing an output electric signal representative of the vibrations of the resonator, a read-out device connected to an input of the detector and configured for simultaneously measuring, from the output signal of the detector, the change in resonance frequency and the change in amplitude of the vibrations at the resonance frequency of the resonator, and a processing device configured for determining from the changes a fluidic characteristic of the gas.Type: GrantFiled: December 2, 2014Date of Patent: January 8, 2019Inventors: Philippe Andreucci, Eric Colinet, Laurent Duraffourg, Edward Myers, Mélanie Petitjean, Mickael Lee Roukes, Joshua Whiting