Patents by Inventor Vadim I. Smirnov
Vadim I. Smirnov 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: 8724207Abstract: Recent invention of longitudinally chirped volume Bragg gratings has dramatically changed a design of high power femtosecond lasers. Replacing of bulky pairs of conventional surface gratings with compact and robust chirped volume Bragg gratings for stretching and compression of laser pulses in chirped-pulse-amplification systems enabled decrease of size and weight of those systems by several times. The methods and devices enable substantial increase of stretching time and compression to shorter pulses, enhancement of stretched and compressed beams quality by stationary or dynamic shaping of gratings, and shaping of laser pulses in both temporal and spectral domains.Type: GrantFiled: January 13, 2011Date of Patent: May 13, 2014Assignees: University of Central Florida Research Foundation, Inc., Optigrate CorporationInventors: Oleksiy Andrusyak, Almantas Galvanauskas, Leonid B. Glebov, Larissa Glebova, Julien Lumeau, Sergiy Mokhov, Eugeniu Rotari, Vadim I. Smirnov, Boris Ya Zeldovich
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Patent number: 8399155Abstract: Apparatus, methods and systems for production of high efficiency refractive and diffractive elements by providing a photo-sensitizer free multicomponent glass, exposing the multi component glass to pulsed laser radiation to produce refractive indexed modulation, and heating the exposed multicomponent silicate glass to produce the high efficiency refractive and diffractive elements. The pulsed laser radiation is infrared femtosecond pulses to ultraviolet nanosecond pulses which provide ionization of glass matrix. The multicomponent glass is a photosensitive glass with high transparency in ultraviolet spectral region, e.g. silicate glass which includes silver, fluorine and bromine and does not contain photosensitizers such as cerium and antimony, PTR glass, cerium free PTR glass and cerium+antimony free PTR glass.Type: GrantFiled: May 3, 2007Date of Patent: March 19, 2013Assignee: University of Central Florida Research Foundation, Inc.Inventors: Leo A. Siiman, Julien Lumeau, Larissa Glebova, Vadim I. Smirnov, Leonid B. Glebov
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Patent number: 7949217Abstract: According to one embodiment, an apparatus for deflecting light beams comprises an input deflector and one or more Bragg gratings. The input deflector receives light beams from input channels, and deflects each light beam to an initial deflection angle. A Bragg grating deflects at least one light beam from the initial deflection angle to an increased deflection angle, where the increased deflection angle is at least closer to an output channel than the initial deflection angle.Type: GrantFiled: May 1, 2008Date of Patent: May 24, 2011Assignee: Fujitsu LimitedInventors: Alexei L. Glebov, Vadim I. Smirnov
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Patent number: 7700270Abstract: Double Bragg grating scanner receivers (DBS) and methods thereof based on spinning high-efficiency transmitting or reflecting holograms in photo-thermo-refractive (PTRG) glass provides unlimited field of view while incident angle for all components do not exceed approximately 45 degrees. The devices and methods are highly tolerable to high power laser radiation and has no restriction for the use in any laser systems working in visible and near IR spectral regions. Rate of scanning by DBS is higher compared to known mechanical scanners because the use of thin glass plates with recorded holograms and spinning instead of rocking. The components described herein are holographic optical devices (reflecting and transmitting volume gratings) for visible and near IR spectral regions with absolute diffraction efficiency exceeding approximately 95% and high thermal, optical and mechanical stability.Type: GrantFiled: April 29, 2004Date of Patent: April 20, 2010Assignee: University of Central Florida Research Foundation, Inc.Inventors: Leonid R. Glebov, Vadim I. Smirnov
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Publication number: 20090274409Abstract: According to one embodiment, an apparatus for deflecting light beams comprises an input deflector and one or more Bragg gratings. The input deflector receives light beams from input channels, and deflects each light beam to an initial deflection angle. A Bragg grating deflects at least one light beam from the initial deflection angle to an increased deflection angle, where the increased deflection angle is at least closer to an output channel than the initial deflection angle.Type: ApplicationFiled: May 1, 2008Publication date: November 5, 2009Inventors: Alexei L. Glebov, Vadim I. Smirnov
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Patent number: 7609743Abstract: A volume Bragg laser including a resonator comprising photo-thermo-refractive (PTR) volume diffractive elements that can be used in a laser emitting window of transparency of PTR glass to provide control of the lasers spectral and angular parameters, and methods, devices, apparatus and systems related thereto. The high efficiency volume Bragg gratings recorded in photo-thermo-refractive (PTR) glass preferably has an absolute diffraction efficiency exceeding approximately 95% in transmitting and reflecting modes is used for selection of a transverse and longitudinal mode for thermal, optical and mechanical stabilization of the volume Bragg lasers and coherent coupling of different lasers. Robustness, compactness, thermal and laser stability along with the ability to place several elements in the same space allows the use of sophisticated optical system according to the invention in fields of military lasers, optical communications, data storage and processing, and the like.Type: GrantFiled: October 26, 2007Date of Patent: October 27, 2009Assignee: University of Central Florida Research Foundation, Inc.Inventors: Leonid B. Glebov, Vadim I. Smirnov, George Venus
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Patent number: 7424185Abstract: High efficiency reflective volume Bragg gratings with chirped gratings recorded in photo-thermo-refractive glass having an absolute diffraction efficiency exceeding 95% in transmitting and reflecting modes are used to stretch and/or compress ultrashort laser pulses with high efficiency. Robustness, compactness, thermal and laser stability along with placement of multiple elements in the same space provides femtosecond laser system with high efficiency of stretching and re-compression of femtosecond pulses.Type: GrantFiled: December 22, 2005Date of Patent: September 9, 2008Assignees: University of Central Florida Research Foundation, Inc., University of MichiganInventors: Leonid B Glebov, Emilie Flecher, Vadim I. Smirnov, Almantas Galvanauskas, Kai-Hsiu Liao
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Patent number: 7394842Abstract: A volume Bragg laser including a resonator comprising photo-thermo-refractive (PTR) volume diffractive elements that can be used in a laser emitting window of transparency of PTR glass to provide control of the lasers spectral and angular parameters, and methods, devices, apparatus and systems related thereto. The high efficiency volume Bragg gratings recorded in photo-thermo-refractive (PTR) glass preferably has an absolute diffraction efficiency exceeding approximately 95% in transmitting and reflecting modes is used for selection of a transverse and longitudinal mode for thermal, optical and mechanical stabilization of the volume Bragg lasers and coherent coupling of different lasers. Robustness, compactness, thermal and laser stability along with the ability to place several elements in the same space allows the use of sophisticated optical system according to the invention in fields of military lasers, optical communications, data storage and processing, and the like.Type: GrantFiled: April 26, 2005Date of Patent: July 1, 2008Assignee: Research Foundation of the University of Central Florida, Inc.Inventors: Leonid B. Glebov, Vadim I. Smirnov, George Venus
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Patent number: 7326500Abstract: Photo-thermo-refractive (PTR) glass is a multi-component silicate glass having photosensitivity in rear UV region. A novel process is disclosed for PTR glass sensitization to visible region by means of two-step illumination followed by thermal development. This disclosed process utilizes a first illumination at approximately 325 nm followed by a second illumination with radiation in the visible spectral region out of the region of original photosensitivity of the PTR glass which enables fabrication of complex holographic optical elements for visible region such as plane elements, lenses, curved mirrors, combinations of complex elements and optical correlators. The same process provides a positive increment of refractive index in the bulk of the PTR glass and, therefore, can be used for refractive optical elements recording, such as lenses and waveguides.Type: GrantFiled: September 19, 2003Date of Patent: February 5, 2008Assignee: University of Central Florida Research Foundation, Inc.Inventors: Leonid B. Glebov, Vadim I. Smirnov
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Patent number: 7324286Abstract: Non-mechanical optical beam steering and switching is produced by optically controlled liquid crystal spatial light modulator with angular magnification by high efficiency volume Bragg gratings recorded in a photosensitive PTR glass. Small angle beam deflection in a photoactive liquid crystal cell is produced by exposing it to a controlling beam from an external source of radiation with predetermined distribution of power density which causes predetermined spatial gradients of a refractive index in a liquid crystal cell and, therefore, refraction of a controlled beam which is made to propagate in the region with spatial gradient of the refractive index. Large angle beam deflection is produced by a volume Bragg grating with angular selectivity adjusted in such way that small angle scanning produced by optically controlled liquid crystal spatial light modulator results in change of diffraction efficiency from zero to 100% for switching the beam for two Bragg angles.Type: GrantFiled: April 6, 2006Date of Patent: January 29, 2008Assignee: University of Central Florida Research FoundationInventors: Leonid B Glebov, Vasile Rotar, Vadim I Smirnov, Sarik Nersisyan, Nelson Tabirian
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Patent number: 6673497Abstract: Novel volume holographic elements were made from Bragg diffractive gratings in photo-thermo-refractive (PTR) glass with absolute diffraction efficiency ranging from greater than approximately 50% up to greater than approximately 93% and total losses below 5%. Both transmitting and reflecting volume diffractive elements were done from PTR glasses because of high spatial resolution enabling recording spatial frequencies up to 10000 mm−1. The use of such diffractive elements as angular selector, spatial filter, attenuator, switcher, modulator, beam splitter, beam sampler, beam deflectors controlled by positioning of grating matrix, by a small-angle master deflector or by spectral scanning, selector of particular wavelengths (notch filter, add/drop element, spectral shape former (gain equalizer), spectral sensor (wavelength meter/wavelocker), angular sensor (pointing locker), Bragg spectrometer (spectral analyzer), transversal and longitudinal mode selector in laser resonator were described.Type: GrantFiled: December 28, 2000Date of Patent: January 6, 2004Assignee: University of Central FloridaInventors: Oleg M. Efimov, Leonid B. Glebov, Vadim I. Smirnov
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Patent number: 6586141Abstract: A novel process is proposed for the volume diffractive element (Bragg grating) fabrication in photosensitive silicate glasses doped with silver, cerium, fluorine, and bromine. The process employs a photo-thermo-refractive (PTR) glass of high purity exposed to ultraviolet (UV) radiation of a He—Cd laser at 325 nm followed by thermal development at temperatures from 480° C. to 580° C., preferably at 520° C., from several minutes to several hours. Absolute diffraction efficiency up to 95% was observed for 1 mm thick gratings. Maximum spatial frequency recorded in PTR glass was about of 10,000 mm−1. No decreasing of diffraction efficiency were detected at low spatial frequencies. Original glasses were transparent (absorption coefficient less than 1 cm−1) from 350 to 4100 nm. Induced losses in exposed and developed glass decreased from 0.3 to 0.03 cm−1 between 400 and 700 nm, respectively, and did not exceed 0.01-0.02 cm−1 in the infrared (IR) region from 700 to 2500 nm.Type: GrantFiled: August 24, 2000Date of Patent: July 1, 2003Assignee: University of Central FloridaInventors: Oleg M. Efimov, Leonid B. Glebov, Vadim I. Smirnov, Larissa Glebova
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Publication number: 20020045104Abstract: Novel volume holographic elements were made from Bragg diffractive gratings in photo-thermo-refractive (PTR) glass with absolute diffraction efficiency ranging from greater than approximately 50% up to greater than approximately 93% and total losses below 5%. Both transmitting and reflecting volume diffractive elements were done from PTR glasses because of high spatial resolution enabling recording spatial frequencies up to 10000 mm−1. The use of such diffractive elements as angular selector, spatial filter, attenuator, switcher, modulator, beam splitter, beam sampler, beam deflectors controlled by positioning of grating matrix, by a small-angle master deflector or by spectral scanning, selector of particular wavelengths (notch filter, add/drop element, spectral shape former (gain equalizer), spectral sensor (wavelength meter/wavelocker), angular sensor (pointing locker), Bragg spectrometer (spectral analyzer), transversal and longitudinal mode selector in laser resonator were described.Type: ApplicationFiled: December 28, 2000Publication date: April 18, 2002Inventors: Oleg M. Efimov, Leonid B. Glebov, Vadim I. Smirnov