Patents by Inventor Laurent Gasca
Laurent Gasca 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: 8441722Abstract: An amplifier optical fiber comprising a central core of a dielectric matrix doped with at least one element ensuring the amplification of an optical signal transmitted in the fiber and a cladding surrounding the central core and suitable for confining the optical signal transmitted in the core. The fiber also comprises metallic nanostructures suitable for generating an electronic surface resonance in the dielectric matrix of central core, the wavelength of said electronic surface resonance corresponding to an excitation level of the element ensuring the amplification.Type: GrantFiled: February 12, 2009Date of Patent: May 14, 2013Assignee: Draka Comteq, B.V.Inventors: Ekaterina Burov, Alain Pastouret, Laurent Gasca, Christine Collet
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Publication number: 20110158595Abstract: The invention relates to an optical waveguide, in particular an optical fibre comprising a core, formed from a material based on rare-earth-ion-doped silica, covered by an optical cladding. Nanoparticles, at least some of which are metal nanoparticles, are dispersed in the material of the core. The optical devices, such as especially optical amplifiers, comprise an optical fibre having a core formed, from a material based on rare-earth-ion-doped silica covered with an optical cladding, nanoparticles, at least some of which are metal nanoparticles, being dispersed in the material of the core, and a pumping source delivering electromagnetic excitation radiation, which propagates in the core.Type: ApplicationFiled: January 27, 2009Publication date: June 30, 2011Applicant: Alcatel LucentInventors: Ekaterina Burov, Alain Pastouret, Christian Simonneau, Laurent Gasca, Christine Collet
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Patent number: 7869686Abstract: The invention consists in an amplifying optical fiber comprising a core containing a dopant and a cladding, wherein said core comprises a monomode core intended to propagate an optical signal, quantum dots of a semiconductor material being disposed in or near said monomode core, and a multimode core surrounding the monomode core, intended to receive a pumping signal.Type: GrantFiled: November 6, 2006Date of Patent: January 11, 2011Assignee: AlcatelInventors: Christian Simonneau, Laurent Gasca, Stéphanie Blanchandin, Dominique Bayart
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Patent number: 7813614Abstract: The invention consists in an amplifying optical fiber comprising a core containing a dopant and a cladding, wherein said core comprises a monomode core intended to propagate an optical signal, quantum dots of a semiconductor material being disposed in or near said monomode core, and a multimode core surrounding the monomode core, intended to receive a pumping signal.Type: GrantFiled: October 5, 2009Date of Patent: October 12, 2010Assignee: AlcatelInventors: Christian Simonneau, Laurent Gasca, Stephanie Blanchandin, Dominique Bayart
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Patent number: 7657142Abstract: The invention concerns a method for making an optical fiber (18) including the following steps: producing a preform (10) containing nanoparticles provided with an active element including at least one recess (14) proximate at least part of the nanoparticles; fiber drawing of the preform (10) by introducing a non-oxidizing gas in the recess (14), thereby limiting the risks of oxidizing the nanoparticles of the preform (10). The preform (10) designed to the manufacture of an optical fiber (18) by the inventive method comprises nanoparticles provided with an active element in a doped zone (12) and at least one recess (14) proximate the doped zone (12).Type: GrantFiled: August 28, 2006Date of Patent: February 2, 2010Assignee: Alcatel LucentInventors: Laurent Gasca, Stéphanie Blanchandin, Alain Pastouret, Christian Simonneau
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Publication number: 20100020388Abstract: The invention consists in an amplifying optical fiber comprising a core containing a dopant and a cladding, wherein said core comprises a monomode core intended to propagate an optical signal, quantum dots of a semiconductor material being disposed in or near said monomode core, and a multimode core surrounding the monomode core, intended to receive a pumping signal.Type: ApplicationFiled: October 5, 2009Publication date: January 28, 2010Applicant: AlcatelInventors: Christian SIMONNEAU, Laurent Gasca, Stephanie Blanchandin, Dominique Bayart
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Patent number: 7627220Abstract: The invention relates to optical fibers incorporating cavities in their structure.Type: GrantFiled: April 1, 2005Date of Patent: December 1, 2009Assignee: AlcatelInventors: Lionel Provost, Gilles Melin, Laurent Gasca
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Publication number: 20090207486Abstract: An amplifier optical fiber comprising a central core of a dielectric matrix doped with at least one element ensuring the amplification of an optical signal transmitted in the fiber and a cladding surrounding the central core and suitable for confining the optical signal transmitted in the core. The fiber also comprises metallic nanostructures suitable for generating an electronic surface resonance in the dielectric matrix of central core, the wavelength of said electronic surface resonance corresponding to an excitation level of the element ensuring the amplification.Type: ApplicationFiled: February 12, 2009Publication date: August 20, 2009Applicant: DRAKA COMTEQ BVInventors: Ekaterina Burov, Alain Pastouret, Laurent Gasca, Christine Collet
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Publication number: 20080285930Abstract: The invention concerns a method for making an optical fiber (18) including the following steps: producing a preform (10) containing nanoparticles provided with an active element including at least one recess (14) proximate at least part of the nanoparticles; fiber drawing of the preform (10) by introducing a non-oxidizing gas in the recess (14), thereby limiting the risks of oxidizing the nanoparticles of the preform (10). The preform (10) designed to the manufacture of an optical fiber (18) by the inventive method comprises nanoparticles provided with an active element in a doped zone (12) and at least one recess (14) proximate the doped zone (12).Type: ApplicationFiled: August 28, 2006Publication date: November 20, 2008Applicant: Alcatel LucentInventors: Laurent Gasca, Stephanie Blanchandin, Alain Pastouret, Christian Simonneau
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Patent number: 7424195Abstract: Optical fiber having a multimode core (10) comprising:—a first zone (11), which is homogeneous, made of a first material, which has a first refractive index;—a second zone (12) made of at least one second material, which has a second refractive index, which is less than the first index, that second zone (12) being peripherally arranged with respect to the first zone (11), said first and second zones being configured so that the interface between those zones defines, in a transverse plane, a contour which has a star shape such that the multimode transmission characteristics of the fiber are equivalent to those of a graded-index fiber. Application in dual-core amplifying fibers or lasers or in transmission fibers for local networks.Type: GrantFiled: June 16, 2004Date of Patent: September 9, 2008Assignee: AlcatelInventors: Xavier Andrieu, Lionel Provost, Laurent Gasca
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Publication number: 20080118213Abstract: Optical fiber having a multimode core (10) comprising:—a first zone (11), which is homogeneous, made of a first material, which has a first refractive index;—a second zone (12) made of at least one second material, which has a second refractive index, which is less than the first index, that second zone (12) being peripherally arranged with respect to the first zone (11), said first and second zones being configured so that the interface between those zones defines, in a transverse plane, a contour which has a star shape such that the multimode transmission characteristics of the fiber are equivalent to those of a graded-index fiber. Application in dual-core amplifying fibers or lasers or in transmission fibers for local networks.Type: ApplicationFiled: June 16, 2004Publication date: May 22, 2008Applicant: Draka Comteq B.V.Inventors: Xavier Andrieu, Lionel Provost, Laurent Gasca
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Publication number: 20070201801Abstract: The invention relates to optical fibers incorporating cavities in their structure.Type: ApplicationFiled: April 1, 2005Publication date: August 30, 2007Inventors: Lionel Provost, Gilles Melin, Laurent Gasca
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Publication number: 20070127877Abstract: The invention consists in an amplifying optical fiber comprising a core containing a dopant and a cladding, wherein said core comprises a monomode core intended to propagate an optical signal, quantum dots of a semiconductor material being disposed in or near said monomode core, and a multimode core surrounding the monomode core, intended to receive a pumping signal.Type: ApplicationFiled: November 6, 2006Publication date: June 7, 2007Inventors: Christian SIMONNEAU, Laurent Gasca, Stephanie Blanchandin, Dominique Bayart
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Patent number: 7197219Abstract: An optical module for chromatic dispersion compensation comprises an optical fiber wound so as to present a variable radius of curvature. The fiber has an index profile such that it has, for the main propagation mode, a negative dispersion value having a minimum at a given wavelength in a given spectral band. The value and the spectral position of the dispersion minimum vary with the radius of curvature of the fiber. The module allows the introduction of a large chromatic dispersion compensation value overall of a given spectral band, as well as compensation corrections for specific wavelengths inside the given spectral band.Type: GrantFiled: November 17, 2004Date of Patent: March 27, 2007Assignee: Draka Comteq B.V.Inventors: Lionel Provost, Pierre Sansonetti, Christine Moreau, Laurent Gasca, Jean-Marc Blondy, Jean-Louis Auguste, Sebastien Fevrier, Frederic Gerome
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Patent number: 7034995Abstract: An optical fiber amplifier is considered comprising a mono-mode core, a first cladding around said core and at least a further cladding around said first cladding while said first cladding includes a ring shaped active region doped with rare earth material surrounding said mono-mode core. Advantageously, the first cladding is designed with a radial refractive index following an almost continuous decreasing function for increasing radius. The use of a continuously decreasing refractive index for the cladding at the outer border of the ring shaped active medium optimize the efficiency of the coupling between the core and the cladding.Type: GrantFiled: September 29, 2003Date of Patent: April 25, 2006Assignee: ALCATELInventors: Lionel Provost, Christian Simonneau, Isabelle Bongrand, Philippe Bousselet, Christine Moreau, Dominique Bayart, Laurent Gasca
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Patent number: 7031590Abstract: The present invention concerns an optical guide (100) comprising an amplifier medium including: a core (10) in a main matrix of a transparent material, the main matrix containing particules (1, 2), each particule being formed of a submicronic matrix distinct from the main matrix and doped by an active metal element, an external guiding cladding (11) in contact with the core (10). The size of the particules (1, 2) is smaller than 20 nm. The present invention also concerns a method for producing this guide.Type: GrantFiled: March 14, 2003Date of Patent: April 18, 2006Assignee: AlcatelInventors: Laurent Gasca, Alain Pastouret, Christine Moreau, Pascal Baniel, Christian Belouet
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Publication number: 20050254762Abstract: An optical module for chromatic dispersion compensation comprises an optical fiber wound so as to present a variable radius of curvature. The fiber has an index profile such that it has, for the main propagation mode, a negative dispersion value having a minimum at a given wavelength in a given spectral band. The value and the spectral position of the dispersion minimum vary with the radius of curvature of the fiber. The module allows the introduction of a large chromatic dispersion compensation value overall of a given spectral band, as well as compensation corrections for specific wavelengths inside the given spectral band.Type: ApplicationFiled: November 17, 2004Publication date: November 17, 2005Inventors: Lionel Provost, Pierre Sansonetti, Christine Moreau, Laurent Gasca, Jean-Marc Blondy, Jean-Louis Auguste, Sebastien Fevrier, Frederic Gerome
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Patent number: 6895155Abstract: An optical fiber with microstructures comprises a plurality of capillary tubes disposed around a central rod and including a self-cleaning layer including molecules able to react with hydroxyl molecules to produce volatile gaseous substances.Type: GrantFiled: August 20, 2003Date of Patent: May 17, 2005Assignee: AlcatelInventors: Laurent Gasca, Gilles Melin, Xavier Rejeaunier, Simon Lempereur, Christine Moreau, Anne Fleureau
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Patent number: 6859585Abstract: An optical filter comprising a slanted Bragg grating inscribed in an optical fiber portion comprising a core having a refractive index n1 and a radius Rcore and a cladding having an average refractive index n2 lower than n1 and a radius Rcladding, the core and the cladding of the fiber being doped with a photosensitive dopant in the fiber portion comprising the Bragg grating, which filter is characterized in that, in the fiber portion comprising the Bragg grating, the photosensitivity of the cladding is greater than the photosensitivity of the core and the cladding includes an index step area having a refractive index n3 greater than n2 and less than n1, said index step area having a width L defined by an inside radius Rs1 greater than or equal to the radius Rcore of the core and an outside radius Rs2 less than or equal to the radius Rcladding of the cladding.Type: GrantFiled: June 24, 2003Date of Patent: February 22, 2005Assignee: AlcatelInventors: Carlos De Barros, Lionel Provost, Marianne Molina, Isabelle Riant, Laurent Gasca
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Patent number: 6853787Abstract: An optical fiber comprises a silica multimode optical core having a refractive index n1 and at least one polymer optical cladding having a refractive index n2, with n1>n2. It further comprises a heterogeneous polymer intermediate optical cladding situated between the multimode core and the optical cladding and having a refractive index substantially equal to the refractive index n1 of the multimode core.Type: GrantFiled: September 17, 2002Date of Patent: February 8, 2005Assignee: AlcatelInventors: Xavier Andrieu, Anne Decaumont, Laurent Gasca