1
Brian L Hoekstra, Leonid B Glebov, Oleg M Efimov: Method and apparatus for separating non-metallic substrates utilizing a laser initiated scribe. Accudyne Display and Semiconductor Systems, Banner & Witcoff, April 3, 2001: US06211488 (119 worldwide citation)

An apparatus and method for physically separating non-metallic substrates forms a microcrack in the substrate and controllingly propagates the microcrack. An initial mechanical or pulsed laser scribing device forms a microcrack in the substrate. If a pulsed laser is used, it forms a crack inside the ...


2
Oleg M Efimov, Leonid B Glebov, Vadim I Smirnov: High efficiency volume diffractive elements in photo-thermo-refractive glass. University of Central Florida, Brian S Steinberger, Law Offices of Brian S Steinberger P A, January 6, 2004: US06673497 (65 worldwide citation)

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 ...


3
Oleg M Efimov, Leonid B Glebov, Vadim I Smirnov, Larissa Glebova: Process for production of high efficiency volume diffractive elements in photo-thermo-refractive glass. University of Central Florida, Brian S Steinberger, Law Offices of Brian S Steinberger P A, July 1, 2003: US06586141 (55 worldwide citation)

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 la ...


4
Keyvan Sayyah, Pamela R Patterson, Oleg M Efimov: Single chip scanning lidar and method of producing the same. HRL Laboratories, Ladas & Parry, April 12, 2016: US09310471 (23 worldwide citation)

A chip-scale scanning lidar includes a two dimensional (2D) scanning micromirror for a transmit beam and a 2D scanning micromirror for a receive beam, a laser diode and a photodetector, a first waveguide and first grating outcoupler coupled to a front facet of the laser diode, a second waveguide and ...


5
Oleg M Efimov: High speed photonic analog to digital quantizer. HRL Laboratories, George R Rapacki, Daniel R Allemeier, September 11, 2012: US08263928 (7 worldwide citation)

An input analog signal is applied to electrodes bracketing electro-optically responsive waveguides being driven by a continuous wave or pulsed laser. The waveguides have reflection elements installed with transmission spectra sized, located and designed to transmit the laser light to photodetectors. ...


6
Oleg M Efimov, Alexander A Betin: Nonreciprocal optical element with independent control of transmission opposite directions. Raytheon Company, John E Gunther, Leonard A Alkov, Karl A Vick, November 15, 2005: US06965472 (4 worldwide citation)

A nonreciprocal optical element and method for operating it to effect separate control of intensity and phase (or optical path length) of counter propagating beams over a very wide range. The nonreciprocal optical element includes a circulator for routing a first signal from a first port to a second ...


7
Oleg M Efimov: Apparatus and method for spatial mode selection of planar waveguide and thin slab lasers in the large cross section size direction. HRL Laboratories, Ladas & Parry, June 3, 2008: US07382808 (4 worldwide citation)

A method and apparatus for spatial mode selection of planar waveguide and thin slab lasers in the laser's large cross section size direction. The planar laser has a small cross section size direction orthogonal to a major axis thereof and a large cross section size direction orthogonal to the small ...


8
Daniel Yap, Oleg M Efimov, James H Schaffner: Electro-optic grating modulator. HRL Laboratories, Ladas & Parry, May 10, 2016: US09335568 (3 worldwide citation)

An optical-waveguide grating modulator is compatible with high-frequency electrical modulation signals of limited bandwidth. The modulator comprises an optical grating formed in an optical waveguide constructed from electro-optic (EO) material and an electrode that is an RF waveguide or RF transmiss ...


9
Oleg M Efimov: Apparatus and method for pumping optical fiber. HRL Laboratories, Ladas & Parry, October 14, 2008: US07437033 (3 worldwide citation)

An apparatus and method for pumping optical fibers. An optical element is disposed for directing pump energy into the inner cladding of a dual clad optical fiber, where the optical element has a refractive index greater than the refractive index of the inner cladding. A gradient refractive index str ...


10
Oleg M Efimov, Stanislav I Ionov: Apparatus and method for directing a light beam to a target. The Boeing Company, Thomas F Lebens, Fitch Even Tabin & Flannery, October 24, 2006: US07127138 (3 worldwide citation)

An apparatus for directing light beams onto a target comprising a beam splitter for splitting a main beam into a first split beam and a second split beam; a first beam path for the first split beam, the first beam path including a first aperture, a first lens and a second lens; a second beam path fo ...