Patents by Inventor Gennady Imeshev
Gennady Imeshev 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: 10809455Abstract: A laser-written waveguide comprising, an optical substrate having a first refractive index, a plurality of laser-written tracks buried within the optical substrate and having a second refractive index lower than the first refractive index, one or more concentric geometric regions bounding the plurality of laser-written tracks and a waveguide channel delimited by said concentric geometric regions, wherein said waveguide channel is configured to allow formation of an optical mode.Type: GrantFiled: August 28, 2017Date of Patent: October 20, 2020Assignee: Dolby Laboratories Licensing CorporationInventors: Mark Thomas Triplett, Dzhakhangir V. Khaydarov, Xiaozhen Xu, Gennady Imeshev
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Patent number: 10390995Abstract: Embodiments of this invention relate to a system and method for performing laser ophthalmic surgery. The surgical laser system configured to deliver a laser pulse to a patient's eye comprises a laser engine that includes a compressor configured to compress laser light energy received, the compressor comprising a dispersion or spectrum altering component provided on a computer controlled stage connected to a computing device. A user providing an indication of a desired pulse width received by the computing device causes the computing device to reposition the stage and the component provided thereon, resulting in a different pulse length being transmitted by the laser engine.Type: GrantFiled: November 10, 2016Date of Patent: August 27, 2019Assignee: AMO Development, LLCInventor: Gennady Imeshev
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Publication number: 20190235164Abstract: A laser-written waveguide comprising, an optical substrate having a first refractive index, a plurality of laser-written tracks buried within the optical substrate and having a second refractive index lower than the first refractive index, one or more concentric geometric regions bounding the plurality of laser-written tracks and a waveguide channel delimited by said concentric geometric regions, wherein said waveguide channel is configured to allow formation of an optical mode.Type: ApplicationFiled: August 28, 2017Publication date: August 1, 2019Applicant: Dolby Laboratories Licensing CorporationInventors: Mark Thomas TRIPLETT, Dzhakhangir V. KHAYDAROV, Xiaozhen XU, Gennady IMESHEV
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Patent number: 10014657Abstract: Methods and systems for optical assemblies are disclosed. Optical assemblies can comprise optical elements that may not require active alignment and allow for reduced performance variations. To allow for passive assembly with a machine like a bonder tool, assembly components can have bonding pads and/or fiducial markers that are fabricated using laser micromachining techniques.Type: GrantFiled: July 27, 2015Date of Patent: July 3, 2018Assignee: Dolby Laboratories Licensing CorporationInventors: Gregory David Miller, Gennady Imeshev, James Thomas Triplett
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Publication number: 20180157149Abstract: A device for quasi-phase-matched frequency doubling of broadband light with uncorrelated spectral phase includes a nonlinear optical material, which in turn includes a domain-reversed grating organized in a series of sections along propagation direction of the broadband light through the nonlinear optical material. Each of the sections is characterized by a respective period of the domain-reversed grating. The period within a first connected subset of the series alternates between two discrete values along the propagation direction. A method for designing the domain-reversed grating includes determining a grating function model describing an ideal nonlinear coefficient of a domain-reversed grating, and discretizing the grating function model to a manufacturable grating function having period restricted to a discrete set of manufacturable periods.Type: ApplicationFiled: November 27, 2017Publication date: June 7, 2018Applicant: Dolby Laboratories Licensing CorporationInventors: Alireza MARANDI, Gennady IMESHEV, Dzhakhangir V. KHAYDAROV, Gregory David MILLER
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Publication number: 20170293202Abstract: Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.Type: ApplicationFiled: June 27, 2017Publication date: October 12, 2017Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Gregory David MILLER, Gennady IMESHEV
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Patent number: 9778542Abstract: Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.Type: GrantFiled: June 29, 2015Date of Patent: October 3, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Gregory David Miller, Gennady Imeshev
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Publication number: 20170219743Abstract: Methods and systems for optical assemblies are disclosed. Optical assemblies can comprise optical elements that may not require active alignment and allow for reduced performance variations. To allow for passive assembly with a machine like a bonder tool, assembly components can have bonding pads and/or fiducial markers that are fabricated using laser micromachining techniques.Type: ApplicationFiled: July 27, 2015Publication date: August 3, 2017Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Gregory David MILLER, Gennady IMESHEV, James Thomas TRIPLETT
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Patent number: 9653868Abstract: Modelocked fiber laser resonators may be coupled with optical amplifiers. An isolator optionally may separate the resonator from the amplifier. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. Low dispersion and an in-line interferometer that provides feedback may assist in controlling the frequency components output from the comb source.Type: GrantFiled: July 12, 2016Date of Patent: May 16, 2017Assignee: IMRA America, Inc.Inventors: Martin E. Fermann, Ingmar Hartl, Gennady Imeshev
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Publication number: 20170131618Abstract: Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.Type: ApplicationFiled: June 29, 2015Publication date: May 11, 2017Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Gregory David MILLER, Gennady IMESHEV
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Publication number: 20170119577Abstract: Embodiments of this invention relate to a system and method for performing laser ophthalmic surgery. The surgical laser system configured to deliver a laser pulse to a patient's eye comprises a laser engine that includes a compressor configured to compress laser light energy received, the compressor comprising a dispersion or spectrum altering component provided on a computer controlled stage connected to a computing device. A user providing an indication of a desired pulse width received by the computing device causes the computing device to reposition the stage and the component provided thereon, resulting in a different pulse length being transmitted by the laser engine.Type: ApplicationFiled: November 10, 2016Publication date: May 4, 2017Inventor: Gennady Imeshev
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Publication number: 20170063015Abstract: Modelocked fiber laser resonators may be coupled with optical amplifiers. An isolator optionally may separate the resonator from the amplifier. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. Low dispersion and an in-line interferometer that provides feedback may assist in controlling the frequency components output from the comb source.Type: ApplicationFiled: July 12, 2016Publication date: March 2, 2017Inventors: Martin E. Fermann, Ingmar Hartl, Gennady Imeshev
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Patent number: 9401579Abstract: Modelocked fiber laser resonators may be coupled with optical amplifiers. An isolator optionally may separate the resonator from the amplifier. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. Low dispersion and an in-line interferometer that provides feedback may assist in controlling the frequency components output from the comb source.Type: GrantFiled: November 26, 2013Date of Patent: July 26, 2016Assignee: IMRA America, Inc.Inventors: Martin E. Fermann, Ingmar Hartl, Gennady Imeshev
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Publication number: 20160064891Abstract: Embodiments described herein include a system for producing ultrashort tunable pulses based on ultra broadband OPA or OPG in nonlinear materials. The system parameters such as the nonlinear material, pump wavelengths, quasi-phase matching periods, and temperatures can be selected to utilize the intrinsic dispersion relations for such material to produce bandwidth limited or nearly bandwidth limited pulse compression. Compact high average power sources of short optical pulses tunable in the wavelength range of 1800 to 2100 nm and after frequency doubling in the wavelength range of 900 to 1050 nm can be used as a pump for the ultra broadband OPA or OPG. In certain embodiments, these short pump pulses are obtained from an Er fiber oscillator at about 1550 nm, amplified in Er fiber, Raman-shifted to 1800 to 2100 nm, stretched in a fiber stretcher, and amplified in Tm-doped fiber.Type: ApplicationFiled: June 24, 2015Publication date: March 3, 2016Inventors: Gennady Imeshev, Martin E. Fermann
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Patent number: 9209592Abstract: Embodiments described herein include a system for producing ultrashort tunable pulses based on ultra broadband OPA or OPG in nonlinear materials. The system parameters such as the nonlinear material, pump wavelengths, quasi-phase matching periods, and temperatures can be selected to utilize the intrinsic dispersion relations for such material to produce bandwidth limited or nearly bandwidth limited pulse compression. Compact high average power sources of short optical pulses tunable in the wavelength range of 1800 to 2100 nm and after frequency doubling in the wavelength range of 900 to 1050 nm can be used as a pump for the ultra broadband OPA or OPG. In certain embodiments, these short pump pulses are obtained from an Er fiber oscillator at about 1550 nm, amplified in Er fiber, Raman-shifted to 1800 to 2100 nm, stretched in a fiber stretcher, and amplified in Tm-doped fiber.Type: GrantFiled: December 14, 2012Date of Patent: December 8, 2015Assignee: IMRA AMERICA, INC.Inventors: Gennady Imeshev, Martin E. Fermann
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Publication number: 20150255942Abstract: By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, a low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained.Type: ApplicationFiled: May 19, 2015Publication date: September 10, 2015Applicant: IMRA AMERICA, INC.Inventors: Martin E. FERMANN, Gennady IMESHEV, Gyu C. CHO, Zhenlin LIU, Donald J. HARTER
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Patent number: 9042004Abstract: By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, a low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained.Type: GrantFiled: July 8, 2013Date of Patent: May 26, 2015Assignee: IMRA AMERICA, INC.Inventors: Martin E. Fermann, Gennady Imeshev, Gyu C. Cho, Zhenlin Liu, Donald J. Harter
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Publication number: 20140324032Abstract: An apparatus and method for performing ophthalmic laser surgery is provided. The apparatus includes a laser engine configured to deliver a laser pulse to a patient's eye, including a three-port isolator and a collimator attached to the three-port isolator. The collimator includes a collimating lens positioned adjacent to the three-port isolator and a fiber configured to receive laser light energy and provide laser light energy to the collimating lens and three-port isolator in a desired orientation.Type: ApplicationFiled: February 28, 2014Publication date: October 30, 2014Inventor: Gennady Imeshev
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Publication number: 20140276672Abstract: Embodiments of this invention are directed to a laser system configured to deliver a pulsed laser beam to a patient's eye. The system includes a laser engine comprising an optically-pumped laser oscillator configured with an extracavity waveplate, and an optional intracavity waveplate, that can be tilted and rotated to provide a limited range of wavelengths for laser mode excitation and to maintain stable mode-locked laser operation. In an embodiment, the present design includes an oscillator and a photosensor, such as a fast photodetector or an autocorrelator, positioned to receive a beam of laser light associated with the oscillator or laser engine, and a controller configured to receive readings from the photosensor and alter the laser gain provided within the oscillator to a level outside the bistable performance zone avoiding mode and gain competitions.Type: ApplicationFiled: March 5, 2014Publication date: September 18, 2014Inventors: John WY Lee, Jian He, Jiandong Xu, Donald Simpson, Gennady Imeshev, Oleg J. Korovyanko, Zenon Witowski
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Publication number: 20140276669Abstract: Embodiments of this invention relate to a system and method for performing laser ophthalmic surgery. The surgical laser system configured to deliver a laser pulse to a patient's eye comprises a laser engine that includes a compressor configured to compress laser light energy received, the compressor comprising a dispersion or spectrum altering component provided on a computer controlled stage connected to a computing device. A user providing an indication of a desired pulse width received by the computing device causes the computing device to reposition the stage and the component provided thereon, resulting in a different pulse length being transmitted by the laser engine.Type: ApplicationFiled: March 5, 2014Publication date: September 18, 2014Inventor: Gennady Imeshev