Patents by Inventor Ekaterina Burov
Ekaterina Burov 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: 9835502Abstract: Disclosed is a temperature and strain sensing optical fiber including a first doped radial zone (Z1) with an associated first Brillouin shift (BS1) caused by the doping of said zone (Z1) and a second doped radial zone (Z2) with associated second Brillouin shift (BS2) caused by the doping of said second zone (Z2). The concentration and/or composition of the doping materials in said first and second radial zones are chosen such that the first Brillouin Shift (BS1) is different from the second Brillouin Shift (BS2) for all variations of said Brillouin Shifts (BS1, BS2) caused by temperature and/or strain.Type: GrantFiled: January 19, 2012Date of Patent: December 5, 2017Assignee: Draka Comteq B.V.Inventors: Ekaterina Burov, Alain Pastouret, Louis-Anne De Montmorillon
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Patent number: 9322969Abstract: In harsh and hazardous environments, the presence of elevated levels of hydrogen gas is an indicator of chemical and/or radiological activity. The present hydrogen-sensing optical fiber provides rapid and reliable hydrogen detection and quantification, irrespective of temperature fluctuations. The hydrogen-sensing optical fiber does not exhibit significant irreversible hydrogen-induced attenuation losses after exposure to a hydrogen-rich atmosphere.Type: GrantFiled: October 22, 2012Date of Patent: April 26, 2016Assignee: Draka Comteq, B.V.Inventors: Ekaterina Burov, Alain Pastouret, Gilles Melin
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Patent number: 9162917Abstract: An amplifying optical fiber includes an inner core, an inner cladding, a depressed trench, and an outer cladding (e.g., an outer optical cladding). Typically, the inner core includes a main matrix (e.g., silica-based) doped with at least one rare earth element. The depressed trench typically has a volume integral V13 of between about ?2200×10?3 ?m2 and ?1600×10?3 ?m2. Exemplary embodiments of the amplifying optical fiber are suitable for use in a compact configuration and high power applications.Type: GrantFiled: March 2, 2012Date of Patent: October 20, 2015Assignee: Draka Comteq, B.V.Inventors: Ekaterina Burov, Alain Pastouret, Louis-Anne de Montmorillon, Aurelien Bergonzo
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Patent number: 8958674Abstract: Disclosed is an amplifying optical fiber that includes a central core that is suitable for transmitting and amplifying an optical signal and a surrounding optical cladding that is suitable for confining the optical signal transmitted in the central core. The central core is formed from a main matrix that contains nanoparticles doped with at least one rare earth element. The weight concentration of the rare earth dopants in the nanoparticles is typically between about 1 and 20 percent, and the nanoparticle concentration in the central core's main matrix is between about 0.05 percent and 1 percent by volume. The disclosed optical fiber incorporates rare earth ions at high concentrations yet avoids the phenomenon of photodarkening at high transmission power.Type: GrantFiled: December 2, 2009Date of Patent: February 17, 2015Assignee: Draka Comteq, B.V.Inventors: Alain Pastouret, Cedric Gonnet, Ekaterina Burov
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Publication number: 20150003497Abstract: Disclosed is a temperature and strain sensing optical fiber including a first doped radial zone (Z1) with an associated first Brillouin shift (BS1) caused by the doping of said zone (Z1) and a second doped radial zone (Z2) with associated second Brillouin shift (BS2) caused by the doping of said second zone (Z2). The concentration and/or composition of the doping materials in said first and second radial zones are chosen such that the first Brillouin Shift (BS1) is different from the second Brillouin Shift (BS2) for all variations of said Brillouin Shifts (BS1, BS2) caused by temperature and/or strain.Type: ApplicationFiled: January 19, 2012Publication date: January 1, 2015Inventors: Ekaterina Burov, Alain Pastouret, Louis-Anne De Montmorillon
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Patent number: 8787721Abstract: Device for the emission or amplification of a signal, comprising an optical fiber (1) having a solid core (2) of refractive index nc, made of a silica glass doped with a rare earth, such as erbium, ytterbium or neodymium, said core being surrounded by an optical cladding (3, 4, 5, 6, 7, 8) comprising at least a pair of silica layers composed of a first, inner layer (3), having a refractive index greater than the refractive index nc of the core (2), covered by a second, outer layer (4). The optical fiber (1) comprises several pairs of silica layers (3, 4; 5, 6; 7, 8) around the core (2), each pair comprising an inner layer (3, 5, 7) of refractive index ni and an outer layer (4, 6, 8) of refractive index ne, the refractive index ne of the outer layer being lower that the refractive index ni of the inner layer of the same pair.Type: GrantFiled: November 7, 2008Date of Patent: July 22, 2014Assignee: Alcatel LucentInventors: Christian Simonneau, Ekaterina Burov, Sébastien Fevrier
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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
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Patent number: 8503071Abstract: Disclosed is a stimulated Raman scattering effect (SRS), amplifying optical fiber that includes a central core comprising a dielectric matrix that is capable of vibrating at a given frequency (?Raman) under the effect of a pump signal. The optical fiber includes at least one kind of metallic nanostructure that is capable of generating surface plasmon resonance (SPR) in the optical fiber. The metallic nanostructures have a shape and composition such that the frequency of their surface plasmon resonance (?plasmon) corresponds to the frequency of the pump signal (?pump) and/or the frequency of the optical signal transmitted in the optical fiber (?signal).Type: GrantFiled: February 19, 2010Date of Patent: August 6, 2013Assignee: Draka Comteq B.V.Inventors: Ekaterina Burov, Alain Pastouret, Cedric Gonnet, Christine Collet, Olivier Cavani
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Patent number: 8467123Abstract: Disclosed is an optical fiber that includes a central core that is suitable for transmitting and amplifying an optical signal and an inner optical cladding that is suitable for confining the optical signal transmitted within the central core. The central core is formed from a core matrix that contains silica-based nanoparticles doped with at least one rare earth element. The disclosed optical fiber can be used with limited optical losses even in an environment with strong ionizing radiation.Type: GrantFiled: December 8, 2009Date of Patent: June 18, 2013Assignee: Draka Comteq B.V.Inventors: Elise Regnier, Alain Pastouret, Ekaterina Burov
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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: 20120224254Abstract: An amplifying optical fiber includes an inner core, an inner cladding, a depressed trench, and an outer cladding (e.g., an outer optical cladding). Typically, the inner core includes a main matrix (e.g., silica-based) doped with at least one rare earth element. The depressed trench typically has a volume integral V13 of between about ?2200×10?3 ?m2 and ?1600×10?3 ?m2. Exemplary embodiments of the amplifying optical fiber are suitable for use in a compact configuration and high power applications.Type: ApplicationFiled: March 2, 2012Publication date: September 6, 2012Applicant: DRAKA COMTEQ, B.V.Inventors: Ekaterina Burov, Alain Pastouret, Louis-Anne de Montmorillon, Aurelien Bergonzo
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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
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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
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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
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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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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
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Publication number: 20110069724Abstract: The present invention embraces an optical fiber that includes a central core to transmit optical signals and an optical cladding surrounding the central core to confine transmitted optical signals. The optical fiber typically includes metallic nanostructures for increasing second-order nonlinearity effects. The optical fiber typically has a refractive index profile that ensures a phase-matching condition.Type: ApplicationFiled: September 22, 2010Publication date: March 24, 2011Applicant: DRAKA COMTEQ, B.V.Inventors: Simon Richard, Ekaterina Burov, Alain Pastouret, Olivier Cavani
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Publication number: 20110033162Abstract: Device for the emission or amplification of a signal, comprising an optical fibre (1) having a solid core (2) of refractive index nc, made of a silica glass doped with a rare earth, such as erbium, ytterbium or neodymium, said core being surrounded by an optical cladding (3, 4, 5, 6, 7, 8) comprising at least a pair of silica layers composed of a first, inner layer (3), having a refractive index greater than the refractive index nc of the core (2), covered by a second, outer layer (4). The optical fibre (1) comprises several pairs of silica layers (3, 4; 5, 6; 7, 8) around the core (2), each pair comprising an inner layer (3, 5, 7) of refractive index ni and an outer layer (4, 6, 8) of refractive index ne, the refractive index ne of the outer layer being lower that the refractive index ni of the inner layer of the same pair.Type: ApplicationFiled: November 7, 2008Publication date: February 10, 2011Inventors: Christian Simonneau, Ekaterina Burov, Sébastien Fevrier
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Publication number: 20100251775Abstract: A treatment method for an optical fibre including the steps of exposing the fibre to an atmosphere containing deuterium at a given temperature, concentration and pressure, measuring the attenuation in the fibre as a function of time at least one wavelength, during the exposure of the fibre to an atmosphere containing deuterium, identifying an attenuation maximum after an exposure duration, and stopping the exposure of the fibre to the atmosphere containing deuterium when said duration has elapsed.Type: ApplicationFiled: March 22, 2010Publication date: October 7, 2010Applicant: DRAKA COMTEQ B.V.Inventors: Elise Regnier, Frans Gooijer, Stephanus Gerardus Fransiscus Geerings, Ekaterina Burov, Aurelien Bergonzo, Alain Pastouret
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Publication number: 20100214649Abstract: Disclosed is a stimulated Raman scattering effect (SRS), amplifying optical fiber that includes a central core comprising a dielectric matrix that is capable of vibrating at a given frequency (?Raman) under the effect of a pump signal. The optical fiber includes at least one kind of metallic nanostructure that is capable of generating surface plasmon resonance (SPR) in the optical fiber. The metallic nanostructures have a shape and composition such that the frequency of their surface plasmon resonance (?plasmon) corresponds to the frequency of the pump signal (?pump) and/or the frequency of the optical signal transmitted in the optical fiber (?signal).Type: ApplicationFiled: February 19, 2010Publication date: August 26, 2010Applicant: DRAKA COMTEQ B.V.Inventors: Ekaterina Burov, Alain Pastouret, Cedric Gonnet, Christine Collet, Olivier Cavani