Patents Assigned to Observatoire de Paris
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Patent number: 11757168Abstract: A method for manufacturing a superconducting LC-type resonator of the type including at least one high-resistivity substrate on which are printed an inductive meander, a first so-called lower electrode and a second so-called upper electrode arranged opposite the first so as to form together a capacitor connected in parallel with the inductive meander, as well as inductive coupling means dedicated to the resonator, in which a sacrificial aluminium layer is deposited between the first and second electrodes. Also disclosed is the superconducting LC-type resonator thus obtained and the use of such a resonator for detecting the noise of a millimetre photon.Type: GrantFiled: December 4, 2019Date of Patent: September 12, 2023Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, OBSERVATOIRE DE PARIS, CY CERGY PARIS UNIVERSITÉ, SORBONNE UNIVERSITE, UNIVERSITÉ DE PARISInventors: Faouzi Boussaha, Samir Beldi, Christine Chaumont, Thibaut Vacelet
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Patent number: 11451722Abstract: The invention relates to a method for acquiring an image by an imager (20) comprising a matrix of pixels configured to generate an electric response when exposed to an incident light flux travelling through an optical path (21) in which is arranged a wavefront correction element (22), comprising the following steps: 1) initiating the exposure of the pixels to the incident light flux; 2) for a plurality of iterations during the exposure: 2.1) non-destructive reading of the electric responses of pixels of a region of interest; 2.2) determining an evolution of the spatial distribution of pixels in logarithmic mode previous iteration with respect to the previous iteration; 2.3) based on said evolution, establishing a command for the wavefront correction element (22) in order to correct the wavefront; 2.4) configuring the wavefront correction element, 3) reading the electric responses of the pixels resulting in an image.Type: GrantFiled: September 17, 2019Date of Patent: September 20, 2022Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SORBONNE UNIVERSITE, ECOLE NORMALE SUPERIEURE, UNIVERSITE DE PARIS, UNIVERSITE DE BOURGOGNE, OBSERVATOIRE DE PARISInventors: David Darson, Julien Dubois, Francois Colas
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Patent number: 10732484Abstract: A THz laser source includes a first generator suitable for emitting at least one first light emission and one second light emission of frequencies that are multiples of a first reference frequency; a second generator suitable for emitting at least one first light emission and one second light emission of frequencies that are multiples of a second reference frequency different from the first reference frequency; the THz laser source furthermore comprises a nonlinear crystal suitable for forming, from the first light emissions emitted by each of the first and second generators, a THz light emission generated by difference-frequency generation, of frequency comprised between 0.3 THz and 10 THz; and at least one first frequency-stabilizing module allowing the frequency of one of the second emissions emitted by one of the first and second generators to be stabilized to an atomic transition.Type: GrantFiled: December 22, 2017Date of Patent: August 4, 2020Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SORBONNE UNIVERSITE, OBSERVATOIRE DE PARISInventor: Mohand Ouali Acef
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Patent number: 10222678Abstract: According to an aspect, the present description concerns a frequency-tunable laser source comprising: a set of N elementary sources (101-k), each elementary source being suitable for emitting a beam at a given central frequency (fk); an optical coupler (12) for coupling the beams emitted by each of the elementary sources in order to form a multi-spectral incident beam (Bin) regrouping all the frequencies of the N elementary sources in a same optical beam; a beam splitter (15) for forming, from the incident beam (Bin), a first beam (B1) and a second beam (B2), each regrouping all the frequencies of the elementary sources; a first tunable filter (16) for selecting, from the first beam (B1), a third beam (B3) at a first frequency (Fj); a second tunable filter (17) for selecting, from the second beam (B2), a fourth beam (B4) at a second frequency (Fl); a nonlinear frequency doubling crystal (18) for generating, from the third beam at the first frequency (Fj), a fifth beam (B5) having a frequency (F2j) which is twType: GrantFiled: March 23, 2016Date of Patent: March 5, 2019Assignees: Centre National De La Recherche Scientifique—CNRS, Observatoire de ParisInventor: Mohand Ouali Acef
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Publication number: 20180356706Abstract: According to an aspect, the present description concerns a frequency-tunable laser source comprising: a set of N elementary sources (101-k), each elementary source being suitable for emitting a beam at a given central frequency (fk); an optical coupler (12) for coupling the beams emitted by each of the elementary sources in order to form a multi-spectral incident beam (Bin) regrouping all the frequencies of the N elementary sources in a same optical beam; a beam splitter (15) for forming, from the incident beam (Bin), a first beam (B1) and a second beam (B2), each regrouping all the frequencies of the elementary sources; a first tunable filter (16) for selecting, from the first beam (B1), a third beam (B3) at a first frequency (F1); a second tunable filter (17) for selecting, from the second beam (B2), a fourth beam (B4) at a second frequency (); a nonlinear frequency doubling crystal (18) for generating, from the third beam at the first frequency (Fj), a fifth beam (B5) having a frequency (F2j) which is twicType: ApplicationFiled: March 23, 2016Publication date: December 13, 2018Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS, Observatoire de ParisInventor: Mohand Ouali Acef
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Patent number: 10041835Abstract: Coherent spectroscopic methods are described, to measure the total phase difference during an extended interrogation interval between the signal delivered by a local oscillator (10) and that given by a quantum system (QS).Type: GrantFiled: December 18, 2015Date of Patent: August 7, 2018Assignees: Centre National De La Recherche Scientifique—CNRS, Institut D'Optique Graduate School, Observatoire De ParisInventors: Andrea Bertoldi, Ralf Kohlhaas, Arnaud Landragin, Philippe Luc Bouyer
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Publication number: 20170356803Abstract: Coherent spectroscopic methods are described, to measure the total phase difference during an extended interrogation interval between the signal delivered by a local oscillator (10) and that given by a quantum system (QS).Type: ApplicationFiled: December 18, 2015Publication date: December 14, 2017Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNR S, Institut d'Optique Graduate School, Observatoire de ParisInventors: Andrea Bertoldi, Ralf Kohlhaas, Arnaud Landragin, Philippe Luc Bouyer
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Patent number: 9690165Abstract: According to a first aspect, the invention relates to a generator of at least three coherent laser beams at least one beam of which is in the infrared domain and at least one beam of which is in the visible domain, comprising: an elementary source for emitting a first continuous-wave laser beam, at a first given infrared wavelength; a nonlinear crystal frequency doubler, allowing, from a first beam sampled from the first laser beam at the first wavelength, a second laser beam to be generated at a second wavelength; and a nonlinear crystal sum frequency generator, allowing, from a second beam sampled from the first laser beam at the first wavelength and from the second laser beam at the second wavelength, a third laser beam to be generated at a third wavelength.Type: GrantFiled: April 15, 2014Date of Patent: June 27, 2017Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS, Observatoire De ParisInventors: Mohand Ouali Acef, Frédéric Du Burck, Noël Dimarcq
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Publication number: 20160124286Abstract: According to a first aspect, the invention relates to a generator of at least three coherent laser beams at least one beam of which is in the infrared domain and at least one beam of which is in the visible domain, comprising: an elementary source for emitting a first continuous-wave laser beam, at a first given infrared wavelength; a nonlinear crystal frequency doubler, allowing, from a first beam sampled from the first laser beam at the first wavelength, a second laser beam to be generated at a second wavelength; and a nonlinear crystal sum frequency generator, allowing, from a second beam sampled from the first laser beam at the first wavelength and from the second laser beam at the second wavelength, a third laser beam to be generated at a third wavelength.Type: ApplicationFiled: April 15, 2014Publication date: May 5, 2016Applicants: Observatoire De Paris, Centre Nationale de la Recherche Scientifique - CNRSInventors: Mohand Ouali Acef, Frédéric Du Burck, Noël Dimarcq
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Patent number: 8385376Abstract: The invention relates to a laser source with an external cavity generating a useful laser beam (Fu), that comprises at least one laser diode DL (10) mounted in an extended optical cavity (30, 82) defined between two reflecting surfaces (92, 48) forming an optical path for a laser beam Fd generated by the laser diode DL, a mode selection filter (44, 86) in the optical path of the cavity for selecting a resonance mode from a range of resonance modes of the laser beam in the cavity.Type: GrantFiled: April 24, 2008Date of Patent: February 26, 2013Assignees: Thales and Centre National d'Etudes Spatiales, Observatoire de ParisInventors: David Holleville, Noel Dimarcq
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Patent number: 8373112Abstract: The disclosure relates to a cold atom interferometry sensor that includes: a source of atoms; a dual-frequency laser capable of generating a first Raman dual-frequency laser beam; a reflector arranged so as to reflect the first Raman dual-frequency laser beam in order to generate a second Raman dual-frequency laser beam, the first laser beam and the second laser beam propagating in different directions in order to obtain atomic interference fringes from the emission of cold atoms obtained from the atom source; characterized in that the reflector is further arranged so as to enable multiple reflections of the first beam on surfaces of the reflector, so that the first beam and the multiple reflections thereof allow the capture of atoms from the atom source in order to obtain the cold atoms.Type: GrantFiled: March 11, 2009Date of Patent: February 12, 2013Assignees: CNRS, Observatoire de ParisInventors: Philippe Bouyer, Arnaud Landragin
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Publication number: 20130022068Abstract: The invention relates to a laser system provided with a laser radiation device (1) in which the radiation frequency is controlled by a heterodyne servo circuit particularly using an interferometric circuit (15). Said interferometric circuit comprises a coil of optical fibres (17) which provide a reference for correcting the laser radiation frequency. To obtain good results in the field of spectral purity, all the elements involved in the laser radiation are fibres and the connections thereof are provided by optical fibres. The invention can be used for lasers requiring high spectral purity.Type: ApplicationFiled: December 3, 2009Publication date: January 24, 2013Applicants: Observatoire de Paris, Centre National de la Recherche Scientifique, Universite Pierre et Marie Curie, Paris 6Inventors: Fabien KEFELIAN, Haifeng JIANG, Pierre LEMONDE, Giorgio SANTARELLI
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Patent number: 8288712Abstract: A guided coherent atom source (1) includes elements for generating neutral atoms in a gaseous state (2), elements for cooling the atoms gas (3), elements for generating a magnetic field (4), including an electro-magnetic micro-chip (6) deposited on a surface (18) of a substrate (14), and capable of condensing the atoms in a magnetic trap, elements for generating an electro-magnetic RF field capable of extracting the condensed atoms, optical elements (10) for emitting and directing an optical coherent beam (12) toward the condensed atoms able to guide the condensed atoms, characterized in that the optical elements (10) and the electro-magnetic micro-chip (6) are integrated onto the same substrate (14). An atomic interferometer using such a source is also disclosed.Type: GrantFiled: March 18, 2009Date of Patent: October 16, 2012Assignees: Ixsea, Institut d'Optique Graduate School, Observatoire de ParisInventors: Philippe Bouyer, Vincent Josse, William Guerin, Juliette Billy, Arnaud Landragin
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Publication number: 20110310919Abstract: The invention relates to a laser system provided with a laser radiation device (1) in which the radiation frequency is controlled by a heterodyne servo circuit particularly using an interferometric circuit (15). Said interferometric circuit comprises a coil of optical fibres (17) which provide a reference for correcting the laser radiation frequency. To obtain good results in the field of spectral purity, all the elements involved in the laser radiation are fibres and the connections thereof are provided by optical fibres. The invention can be used for lasers requiring high spectral purity.Type: ApplicationFiled: December 3, 2009Publication date: December 22, 2011Applicants: OBSERVATOIRE DE PARIS, UNIVERSITE PIERRE ET MARIE CURIE, PARIS 6, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Fabien Kefelian, Haifeng Jiang, Pierre Lemonde, Girorgio Santarelli
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Patent number: 7950801Abstract: The invention relates to a device, for measuring the contrast of fringes in a Michelson interferometer at full field, comprising a Wollaston prism for diverting two perpendicular incident polarizations into two different emergent directions, said diverting means being arranged within the interferometer as substitute for a single polarizer. The device is of application to a Michelson interferometer used in an OCT tomographical system and comprising means for obtaining interferometric contrast without use of a modulation technique or synchronous detection methods.Type: GrantFiled: January 21, 2005Date of Patent: May 31, 2011Assignees: Centre National de la Recherche Scientifique, Observatoire de Paris, Mauna Kea TechnologiesInventors: François Lacombe, David Lafaille
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Patent number: 7658495Abstract: A sighting device for an examination by in vivo tomography of an eye of a subject including a viewer controlled by a control system for displaying at least one moving target where the at least one moving target has at least one of a programmable shape and a programmable trajectory, and is visible by the eye of the subject during the examination period to allow the subject to fixate and follow the target with their eye.Type: GrantFiled: September 12, 2008Date of Patent: February 9, 2010Assignees: Centre National de la Recherche Scientifique, Observatoire de Paris, Mauna Kea TechnologiesInventors: François Lacombe, David Lafaille, Marie Glanc, Eric Gendron, Douchane Stefanovitch
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Publication number: 20090242743Abstract: A guided coherent atom source (1) includes elements for generating neutral atoms in a gaseous state (2), elements for cooling the atoms gas (3), elements for generating a magnetic field (4), including an electro-magnetic micro-chip (6) deposited on a surface (18) of a substrate (14), and capable of condensing the atoms in a magnetic trap, elements for generating an electro-magnetic RF field capable of extracting the condensed atoms, optical elements (10) for emitting and directing an optical coherent beam (12) toward the condensed atoms able to guide the condensed atoms, characterized in that the optical elements (10) and the electro-magnetic micro-chip (6) are integrated onto the same substrate (14). An atomic interferometer using such a source is also disclosed.Type: ApplicationFiled: March 18, 2009Publication date: October 1, 2009Applicants: IXSEA, INSTITUT D'OPTIQUE GRADUATE SCHOOL, OBSERVATOIRE DE PARISInventors: Philippe BOUYER, Vincent JOSSE, William GUERIN, Juliette BILLY, Arnaud LANDRAGIN
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Patent number: 7513619Abstract: An in-vivo high resolution lateral and axial tomography system of the retina, is provided, including a Michelson interferometer, generating a tomographical image by full field OCT interference with Z sweeping, adaptive optical correction apparatus, correcting the wave fronts coming from and going to the eye, including a reference source, a deformable mirror and wave surface analysis apparatus, detection apparatus producing an image from an interferometric measurement using the OCT principle and apparatus for focussing the wave surface analyser. The apparatus for focussing are embodied and controlled, synchronously with the Z sweeping to force the deformable mirror to adopt an additional curvature, such as to combine the input light source and detection apparatus at a given depth in the retina.Type: GrantFiled: January 21, 2005Date of Patent: April 7, 2009Assignees: Centre National de la Recherche Scientifique, Observatoire de Paris, Mauna Kea TechnologiesInventors: François Lacombe, David Lafaille, Marie Glanc, Eric Gendron
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Patent number: 7438415Abstract: A sighting device is provided for an examination of the eye, including at least one moving target with a programmable form and trajectory, the target being displayed on a visualisation unit, such as an appropriate screen and visible from both eyes during the examination. An in-vivo tomographical eye examination system is also provided, including: a Michelson interferometer, generating a full-field OCT image, adaptable optical apparatus, arranged between the interferometer and an eye for examination, achieving the correction of the wavefronts coming from the eye and also the wavefronts going to the eye, detection apparatus, arranged after the interferometer, permitting the interferometric measurement by the OCT principle without modulation nor synchronized detection and a sighting device, with at least one mobile target with a programmable form and trajectory, the target being displayed on an appropriate screen and visible from at least one of the eyes during the examination.Type: GrantFiled: January 21, 2005Date of Patent: October 21, 2008Assignees: Centre National de la Recherche Scientifique, Observatoire de Paris, Mauna Kea TechnologiesInventors: François Lacombe, David Lafaille, Marie Glanc, Eric Gendron, Douchane Stefanovitch