Patents by Inventor David Boivin
David Boivin 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).
-
Patent number: 8675275Abstract: The present invention embraces an amplifying optical fiber having a central core adapted to convey and amplify an optical signal and a cladding that surrounds the central core to confine the optical signal conveyed in the central core. The central core is formed of a core matrix in which nanoparticles are present. The nanoparticles themselves include a nanoparticle matrix and rare-earth-dopant elements. The core matrix may also include one or more additional dopants (i.e., in addition to nanoparticles). The amplifying optical fiber possesses a small numerical aperture and is suitable for use in high-pump-power applications without a degraded gain shape.Type: GrantFiled: November 11, 2010Date of Patent: March 18, 2014Assignee: Draka Comteq, B.V.Inventors: David Boivin, Alain Pastouret, Ekaterina Burov, Cedric Gonnet
-
Patent number: 8428414Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference ?n1 with the optical cladding. The intermediate cladding has a radius r2 and a refractive index difference ?n2 with the optical cladding, wherein ?n2 is less than ?n1. The depressed trench has a radius r3 and a negative index difference ?n3 with the optical cladding. At a wavelength of 1310 nanometers, the optical fiber has a mode field diameter (MFD) between 8.6 microns and 9.5 microns and, at a wavelength of 1550 nanometers, the optical fiber has bending losses less than about 0.25×10?3 dB/turn for a radius of curvature of 15 millimeters. At a wavelength of 1260 nanometers, attenuation of the LP11 mode to 19.3 dB is achieved over less than 90 meters of fiber.Type: GrantFiled: March 26, 2012Date of Patent: April 23, 2013Assignee: Draka Comteq, B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Patent number: 8385705Abstract: Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optional dual coating is specifically balanced for superior heat stripping in fiber ribbons, with virtually no residue left behind on the glass. This facilitates fast splicing and terminations.Type: GrantFiled: March 26, 2012Date of Patent: February 26, 2013Assignee: Draka Comteq, B.V.Inventors: Bob J. Overton, Louis-Anne de Montmorillon, Simon Richard, Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, David Boivin
-
Patent number: 8259389Abstract: Disclosed is an amplifying optical fiber having a central core and an optical cladding surrounding the central core. The central core is based on a silica matrix that includes nanoparticles, which are composed of a matrix material that includes doping ions of at least one rare earth element. The amplifying optical fiber can be employed, for example, in an optical amplifier and an optical laser.Type: GrantFiled: November 12, 2009Date of Patent: September 4, 2012Assignee: Draka Comteq, B.V.Inventors: Alain Pastouret, Ekaterina Burov, David Boivin, Christine Collet, Olivier Cavani
-
Publication number: 20120189258Abstract: Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optional dual coating is specifically balanced for superior heat stripping in fiber ribbons, with virtually no residue left behind on the glass. This facilitates fast splicing and terminations.Type: ApplicationFiled: March 26, 2012Publication date: July 26, 2012Applicant: DRAKA COMTEQ B.V.Inventors: Bob J. Overton, Louis-Anne de Montmorillon, Simon Richard, Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, David Boivin
-
Publication number: 20120183268Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference ?n1 with the optical cladding. The intermediate cladding has a radius r2 and a refractive index difference ?n2 with the optical cladding, wherein ?n2 is less than ?n1. The depressed trench has a radius r3 and a negative index difference ?n3 with the optical cladding. At a wavelength of 1310 nanometers, the optical fiber has a mode field diameter (MFD) between 8.6 microns and 9.5 microns and, at a wavelength of 1550 nanometers, the optical fiber has bending losses less than about 0.25×10?3 dB/turn for a radius of curvature of 15 millimeters. At a wavelength of 1260 nanometers, attenuation of the LP11 mode to 19.3 dB is achieved over less than 90 meters of fiber.Type: ApplicationFiled: March 26, 2012Publication date: July 19, 2012Applicant: DRAKA COMTEQ B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Publication number: 20120148206Abstract: An optical fiber includes a central core and an optical cladding. The central core includes a core matrix surrounding nanoparticles. The nanoparticles include rare earths, a nanoparticle matrix, and an outer layer. The nanoparticle matrix surrounds the rare earths, and the outer layer surrounds the nanoparticle matrix. The atomic ratio of nanoparticle matrix atoms other than oxygen to rare earth atoms is typically between about 300 and 1,000. The outer layer, which typically has a thickness of between about 1 nanometer and 2 nanometers, includes an outer layer matrix that is substantially free from rare earths.Type: ApplicationFiled: December 9, 2011Publication date: June 14, 2012Applicant: DRAKA COMTEQ, B.V.Inventors: David Boivin, Alain Pastouret, Ekaterina Burov, Cedric Gonnet
-
Publication number: 20120134376Abstract: An optical fiber includes a central core for transmitting and amplifying an optical signal, an optical cladding to confine the optical signal transmitted by the central core, and an outer cladding. The central core is formed of a core matrix and nanoparticles. The nanoparticles are formed of a nanoparticle matrix and rare earth dopants (i.e., a nanoparticle matrix surrounding the rare earth dopants). The optical cladding has a plurality of holes separated by a pitch and extending along the length of the optical fiber.Type: ApplicationFiled: November 23, 2011Publication date: May 31, 2012Applicant: DRAKA COMTEQ, B.V.Inventors: Ekaterina Burov, Gilles Melin, Alain Pastouret, David Boivin
-
Patent number: 8145025Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference ?n1 with the optical cladding. The intermediate cladding has a radius r2 and a positive refractive index difference ?n2 with the optical cladding, wherein ?n2 is less than ?n1. The depressed trench has a radius r3 and a negative index difference ?n3 with the optical cladding. At a wavelength of 1310 nanometers, the optical fiber has a mode field diameter (MFD) between 8.6 microns and 9.5 microns and, at a wavelength of 1550 nanometers, the optical fiber has bending losses less than about 0.25×10?3 dB/turn for a radius of curvature of 15 millimeters. At a wavelength of 1260 nanometers, attenuation of the LP11 mode to 19.3 dB is achieved over less than 90 meters of fiber.Type: GrantFiled: May 6, 2009Date of Patent: March 27, 2012Assignee: Draka Comteq, B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Patent number: 8145027Abstract: Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optional dual coating is specifically balanced for superior heat stripping in fiber ribbons, with virtually no residue left behind on the glass. This facilitates fast splicing and terminations.Type: GrantFiled: May 6, 2010Date of Patent: March 27, 2012Assignee: Draka Comteq, B.V.Inventors: Bob J. Overton, Louis-Anne de Montmorillon, Simon Richard, Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, David Boivin
-
Patent number: 8131125Abstract: The present invention embraces a single-mode optical fiber that, at a wavelength of 1550 nanometers, has bending losses of 0.15 dB/turn or less for a radius of curvature of 5 millimeters.Type: GrantFiled: February 11, 2011Date of Patent: March 6, 2012Assignee: Draka Comteq, B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Publication number: 20110135264Abstract: The present invention embraces a single-mode optical fiber that, at a wavelength of 1550 nanometers, has bending losses of 0.15 dB/turn or less for a radius of curvature of 5 millimeters.Type: ApplicationFiled: February 11, 2011Publication date: June 9, 2011Applicant: DRAKA COMTEQ B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Publication number: 20110116160Abstract: The present invention embraces an amplifying optical fiber having a central core adapted to convey and amplify an optical signal and a cladding that surrounds the central core to confine the optical signal conveyed in the central core. The central core is formed of a core matrix in which nanoparticles are present. The nanoparticles themselves include a nanoparticle matrix and rare-earth-dopant elements. The core matrix may also include one or more additional dopants (i.e., in addition to nanoparticles). The amplifying optical fiber possesses a small numerical aperture and is suitable for use in high-pump-power applications without a degraded gain shape.Type: ApplicationFiled: November 11, 2010Publication date: May 19, 2011Applicant: DRAKA COMTEQ B.V.Inventors: David Boivin, Alain Pastouret, Ekaterina Burov, Cedric Gonnet
-
Patent number: 7889960Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference ?n1 with the optical cladding. The intermediate cladding has a radius r2 and a refractive index difference ?n2 with the optical cladding, wherein ?n2 is less than the central core's refractive index difference ?n1. The depressed trench has a radius r3 and a negative index difference ?n3 with the optical cladding. The optical fiber has a nominal mode field diameter (MFD) between 8.6 microns and 9.5 microns at a wavelength of 1310 nanometers, and at a wavelength of 1550 nanometers, the optical fiber has bending losses less than 0.15 dB/turn for a radius of curvature of 5 millimeters and cable cut-off wavelengths of less than or equal to 1260 nanometers.Type: GrantFiled: May 6, 2009Date of Patent: February 15, 2011Assignee: Draka Comteq B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Publication number: 20100290781Abstract: Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optional dual coating is specifically balanced for superior heat stripping in fiber ribbons, with virtually no residue left behind on the glass. This facilitates fast splicing and terminations.Type: ApplicationFiled: May 6, 2010Publication date: November 18, 2010Applicant: DRAKA COMTEQ B.V.Inventors: Bob J. Overton, Louis-Anne de Montmorillon, Simon Richard, Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, David Boivin
-
Publication number: 20100118388Abstract: Disclosed is an amplifying optical fiber having a central core and an optical cladding surrounding the central core. The central core is based on a silica matrix that includes nanoparticles, which are composed of a matrix material that includes doping ions of at least one rare earth element. The amplifying optical fiber can be employed, for example, in an optical amplifier and an optical laser.Type: ApplicationFiled: November 12, 2009Publication date: May 13, 2010Applicant: DRAKA COMTEQ B.V.Inventors: Alain Pastouret, Ekaterina Burov, David Boivin, Christine Collet, Olivier Cavani
-
Publication number: 20090279836Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference ?n1 with the optical cladding. The intermediate cladding has a radius r2 and a refractive index difference ?n2 with the optical cladding, wherein ?n2 is less than the central core's refractive index difference ?n1. The depressed trench has a radius r3 and a negative index difference ?n3 with the optical cladding. The optical fiber has a nominal mode field diameter (MFD) between 8.6 microns and 9.5 microns at a wavelength of nanometers, and at a wavelength of 1550 nanometers, the optical fiber has bending losses less than 0.15 dB/turn for a radius of curvature of 5 millimeters and cable cut-off wavelengths of less than or equal to nanometers.Type: ApplicationFiled: May 6, 2009Publication date: November 12, 2009Applicant: DRAKA COMTEQ B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Publication number: 20090279835Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference ?n1 with the optical cladding. The intermediate cladding has a radius r2 and a positive refractive index difference ?n2 with the optical cladding, wherein ?n2 is less than ?n1. The depressed trench has a radius r3 and a negative index difference ?n3 with the optical cladding. At a wavelength of 1310 nanometers, the optical fiber has a mode field diameter (MFD) between 8.6 microns and 9.5 microns and, at a wavelength of 1550 nanometers, the optical fiber has bending losses less than about 0.25×10?3 dB/turn for a radius of curvature of 15 millimeters. At a wavelength of 1260 nanometers, attenuation of the LP11 mode to 19.3 dB is achieved over less than 90 meters of fiber.Type: ApplicationFiled: May 6, 2009Publication date: November 12, 2009Applicant: DRAKA COMTEQ B.V.Inventors: Louis-Anne de Montmorillon, Simon Richard, Denis Molin, David Boivin, Marianne Bigot-Astruc, Pierre Sillard
-
Patent number: 6091231Abstract: An electric current generation device includes a rotatable rotor including a magnet assembly establishing a magnetic field proximate the rotor. A stator includes at least one set of coils disposed with respect to the rotor so that rotation of the rotor moves the magnetic field with respect to the coils of the coil set to generate electric current flow in the coil set. The coil set includes an impedance component in communication with the electric current flow to limit the rate of increase of electric current flow generated by the coil set as the rotational speed of the rotor increases. The winding direction of at least one coil with respect to the magnetic field may be opposite the winding direction of the other coils with respect to the magnetic field. Two coil sets may be provided wherein the coils of a first coil set are wound so that the output of the first coil set is out of phase with respect of the output of a second coil set.Type: GrantFiled: June 19, 1997Date of Patent: July 18, 2000Assignee: R. E. Phelon Company, Inc.Inventors: David Prunty, David Boivin, Michael Braun