Patents by Inventor Jacques Guerin
Jacques Guerin 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: 7177501Abstract: An optical chromatic dispersion compensation module consists of a portion of fiber (10) comprising a variable pitch Bragg grating and a mechanical structure (1) consisting of two flexible mountings (2, 2?) and one fixed mounting (3). The portion of fiber (10) is attached to said mechanical structure (1) at three points: A first soft mount point (5) is connected to the fixed mounting (3) and two rigid mount points (4, 4?) are connected to the flexible mountings (2, 2?). The module also consists of a mechanical actuator (20) designed to act on the mechanical structure (1) to compress a first portion of the Bragg grating and to stretch a second portion of the Bragg grating while keeping the central section of the grating fixed. The chromatic dispersion value produced by the Bragg grating filter is thus modified, while its central wavelength remains fixed.Type: GrantFiled: April 5, 2005Date of Patent: February 13, 2007Assignee: AlcatelInventors: Jean-Jacques Guerin, Olivier Durand, Fabrice Poussiere
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Publication number: 20060285199Abstract: An optical amplification system is described which comprises an optical amplifier and an optical filter. The gain of the optical amplifier is changeable to different gain values. For every one of the gain values, a wavelength-dependent gain curve exists. At least for one of the gain values, the gain curve varies over the wavelength. An apodized long-period grating (LPG) is used as the optical filter. The apodized LPG provides at least one wavelength-dependent attenuation curve which compensates the gain curve varying over the wavelength.Type: ApplicationFiled: April 8, 2005Publication date: December 21, 2006Inventors: Hedi Labidi, Christian Simonneau, Jean-Jacques Guerin, Valerie Girardon, Xavier Bonnet, Isabelle Riant
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Publication number: 20050220409Abstract: An optical chromatic dispersion compensation module consists of a portion of fiber (10) comprising a variable pitch Bragg grating and a mechanical structure (1) consisting of two flexible mountings (2, 2?) and one fixed mounting (3). The portion of fiber (10) is attached to said mechanical structure (1) at three points: A first soft mount point (5) is connected to the fixed mounting (3) and two rigid mount points (4, 4?) are connected to the flexible mountings (2, 2?). The module also consists of a mechanical actuator (20) designed to act on the mechanical structure (1) to compress a first portion of the Bragg grating and to stretch a second portion of the Bragg grating while keeping the central section of the grating fixed. The chromatic dispersion value produced by the Bragg grating filter is thus modified, while its central wavelength remains fixed.Type: ApplicationFiled: April 5, 2005Publication date: October 6, 2005Inventors: Jean-Jacques Guerin, Olivier Durand, Fabrice Poussiere
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Patent number: 6873765Abstract: A tuneable optical fibre comprising a long-period Bragg grating (5) written in a portion of an optical waveguide (10) comprising a core and an optical cladding (11), characterised in that the portion of the waveguide comprising the grating (5) is at least partially immersed in an external environment consisting of two distinct sections, a first section (1) whose refractive index is higher than that of the optical cladding (11) and a second section (2) whose refractive index is lower than that of the optical cladding (11), the long-period grating being at least partially immersed in one of the said sections so as to almost independently tune the wavelength and/or the contrast of the spectral response of the filter.Type: GrantFiled: April 14, 2003Date of Patent: March 29, 2005Assignee: Avanex CorporationInventors: Hedi Labidi, Carlos De Barros, Hervé Loury, Xavier Bonnet, Isabelle Riant, Jean-Jacques Guerin
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Patent number: 6763152Abstract: The present invention proposes optical fiber equipment having a Bragg grating tunable by a piezoelectric actuator, the equipment comprising an optical fiber, a Bragg grating photoinduced in said fiber, a support for supporting said fiber and comprising two uprights at opposite ends of said Bragg grating, each upright having a first holding element for holding said fiber, and a piezoelectric actuator held via its ends between the two uprights, said actuator being longitudinally prestressed in compression between said uprights.Type: GrantFiled: July 12, 2002Date of Patent: July 13, 2004Assignee: Avanex CorporationInventors: Jean Jacques Guerin, Isabelle Riant
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Patent number: 6757462Abstract: The present invention relates to a Bragg grating filter optical waveguide device, comprising an optical fiber provided with a Bragg grating region which is externally strained to alter the range of chirping. The external strain is induced by a gradient-generating mechanical body bonded onto the length of the fiber grating.Type: GrantFiled: April 4, 2002Date of Patent: June 29, 2004Assignee: Avanex CorporationInventors: Véronique Verdrager, Jean-Jacques Guerin, Isabelle Riant
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Publication number: 20030194182Abstract: A tuneable optical fibre comprising a long-period Bragg grating (5) written in a portion of an optical waveguide (10) comprising a core and an optical cladding (11), characterised in that the portion of the waveguide comprising the grating (5) is at least partially immersed in an external environment consisting of two distinct sections, a first section (1) whose refractive index is higher than that of the optical cladding (11) and a second section (2) whose refractive index is lower than that of the optical cladding (11), the long-period grating being at least partially immersed in one of the said sections so as to almost independently tune the wavelength and/or the contrast of the spectral response of the filter.Type: ApplicationFiled: April 14, 2003Publication date: October 16, 2003Applicant: ALCATELInventors: Hedi Labidi, Carlos De Barros, Herve Loury, Xavier Bonnet, Isabelle Riant, Jean-Jacques Guerin
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Publication number: 20030026543Abstract: A system for compensating chromatic dispersion includes a long variable pitch Bragg grating written in an optical fiber in which wavelength division multiplexed transmission channels propagate. A system for generating a thermal gradient includes at least two heating systems distributed over the grating and controlled independently of each other to compensate simultaneously the chromatic dispersion on a plurality of transmission channels.Type: ApplicationFiled: July 31, 2002Publication date: February 6, 2003Applicant: ALCATELInventors: Veronique Verdrager, Jean-Jacques Guerin, Isabelle Riant
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Publication number: 20030021512Abstract: The present invention proposes optical fiber equipment having a Bragg grating tunable by a piezoelectric actuator, the equipment comprising an optical fiber, a Bragg grating photoinduced in said fiber, a support for supporting said fiber and comprising two uprights at opposite ends of said Bragg grating, each upright having a first holding element for holding said fiber, and a piezoelectric actuator held via its ends between the two uprights, said actuator being longitudinally prestressed in compression between said uprights.Type: ApplicationFiled: July 12, 2002Publication date: January 30, 2003Applicant: ALCATELInventors: Jean Jacques Guerin, Isabelle Riant
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Publication number: 20020168141Abstract: The present invention relates to a Bragg grating filter optical waveguide device, comprising an optical fiber provided with a Bragg grating region which is externally strained to alter the range of chirping. The external strain is induced by a gradient-generating mechanical body bonded onto the length of the fiber grating.Type: ApplicationFiled: April 4, 2002Publication date: November 14, 2002Applicant: ALCATELInventors: Veronique Verdrager, Jean-Jacques Guerin, Isabelle Riant
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Publication number: 20020154862Abstract: The present invention relates to a temperature compensating device for a prestrained fiber grating of an optical fiber, wherein said device comprises a body with a substantially cylindrical form and wherein the fiber grating is wound up on said body, whereby the dimensions of said body vary according to a change in temperature. The temperature compensating devive according to the invention is athermal and allows a tunig of the wavelength of the fiber grating.Type: ApplicationFiled: April 4, 2002Publication date: October 24, 2002Applicant: ALCATELInventors: Jean-Jacques Guerin, Isabelle Riant, Veronique Verdrager
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Patent number: 5121451Abstract: A DFB laser (2) is coupled to a monomode line fiber (14) via an isolator constituted by a Faraday rotator crystal (4) and a polarizing fiber (10) which is welded to a fiber to be coupled (14). A focusing lens (8) is integrated in an intermediate block including the rotator crystal (4) and a permanent magnet (6). The invention is particularly suitable for making light-emitting heads for use in optical fiber telecommunications systems.Type: GrantFiled: December 11, 1989Date of Patent: June 9, 1992Assignee: Alcatel CitInventors: Emmanuel Grard, Daniel Mousseaux, Jean-Luc Beylat, Jacques Auge, Jean-Jacques Guerin, Eugene Duda
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Patent number: 4580082Abstract: The direct-current motor comprises at least one field winding supplied intermittently with direct-current voltage in order to produce a driving torque by interaction with permanent-magnetic poles which rotate with respect to the winding. The electromotive force of induction produced in the winding by the relative rotation of the permanent-magnetic poles is detected by means of a voltage measurement during the time intervals which elapse when the winding is not energized. A low-speed signal is produced when the electromotive force is below a pre-established threshold in correlation with the desired speed-threshold value.Type: GrantFiled: April 15, 1985Date of Patent: April 1, 1986Assignee: Etudes Techniques et Representations Industrielles E.T.R.I.Inventor: Jacques Guerin-Pinaud
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Patent number: 4426597Abstract: The present invention relates to an ionized gas generator with supersonic homogeneous flow. This generator comprises unitary modules comprising:two coaxial electrodes of cylindrical form, the downstream electrode being open and having the flow passing therethrough;means for injecting as vortical gas along planes perpendicular to the axis common to said electrodes, the gas thus injected passing through an electric arc which consequently takes an elongated form;means for striking the arc between the two coaxial electrodes;means for cooling the electrodes, the gas injection devices and the coupling chamber;coils creating around the first upstream electrode a magnetic field ensuring the displacement of the base of the arc around the inner surface of said upstream electrode.The invention is applicable to testing of heat-protection materials.Type: GrantFiled: December 30, 1980Date of Patent: January 17, 1984Assignee: Commissariat a l'Energie AtomiqueInventors: Serge Denoyer, Jacques Guerin, Maxime Labrot, Jean-Pierre Serrano