1
George Anthony Rakuljic, Amnon Yariv, Victor Leyva, Koichi Sayano, Charles E Tyler: Wavelength stabilized laser sources using feedback from volume holograms. Accuwave Corporation, Merchant Gould Smith Edell Welter & Schmidt, November 25, 1997: US05691989 (134 worldwide citation)

A laser utilizes feedback from a volume holographic grating used as a wavelength standard to lock the laser output wavelength to its desired value. This feedback can be non-optical, wherein the holographic filter output is used to actively control the wavelength through an external control mechanism ...


2
Gang Paul Chen, Avishay Eyal, Anthony S Kewitsch, Victor Leyva, George A Rakuljic: System and method for fabricating components of precise optical path length. October 1, 2002: US06459487 (109 worldwide citation)

Optical components, particularly microoptic glass components used in synthesizing birefringence in filter systems based on polarization interferometer techniques, are fabricated using systems and methods which provide accurate frequency periodicity measurements. These measurements are derived from d ...


3
George A Rakuljic, Victor Leyva: Methods and devices for using photorefractive materials at infrared wavelengths. Accuwave Corporation, Merchant Gould Smith Edell Welter & Schmidt, February 13, 1996: US05491570 (57 worldwide citation)

A method of writing plane holographic gratings Bragg-matched for reflection in the infrared in a photorefractive material using shorter wavelength light through a face perpendicular to the grating planes. The writing beam wavelength is selected to be within the photorefractive sensitivity range of t ...


4
Victor Leyva, George A Rakuljic: Fixing method for narrow bandwidth volume holograms in photorefractive materials. Accuwave Corporation, Merchant Gould Smith Edell Welter & Schmidt, August 2, 1994: US05335098 (42 worldwide citation)

An improved method for storing permanent holographic gratings in photorefractive materials for use in narrow band filters such as the H.sub.60 filter, as well as the filters themselves. The invention also provides an improved method of controlling the electric field and the nature of the photorefrac ...


5
George Anthony Rakuljic, Victor Leyva, Amnon Yariv, Koichi Sayano, Arthur Bruce O Connor, Charles E Tyler, Xiaoping Mao, Harold Everett Miller Jr: Fabrication and applications of long-lifetime, holographic gratings in photorefractive materials. Accuwave Corporation, Merchant Gould Smith Edell Welter & Smith, August 18, 1998: US05796096 (40 worldwide citation)

Substantial improvements in photorefractive device lifetimes are provided by control of electron migration which results in the decay of gratings in photorefractive materials due to diffusion and other effects. A new class of photorefractive devices using compensating electronic and ionic gratings h ...


6
George Rakuljic, Anthony S Kewitsch, Victor Leyva: Diffractive fourier optics for optical communications. Arroyo Optics, Jones Tullar & Cooper P C, September 21, 2004: US06795182 (17 worldwide citation)

Systems and methods for modifying, switching, rearranging or otherwise controlling the individual wavelength components of DWDM optical signals are described, which employ compact refolding and reshaping of these dimensionally patterned beams within a confined volume. The wavelength components of th ...


7
Victor Leyva, Xian Li Yeh, Huey Lu: Devices and methods for temperature stabilization of Bragg grating structures. Arroyo Optics, Jones Tullar & Cooper P C, December 4, 2001: US06327405 (12 worldwide citation)

Precisely tensioned optical fiber devices are held in a temperature compensated package, with a small diameter span of a fiber containing a Bragg grating of a needed periodicity being supported under tension at opposite ends between spaced apart end members whose thermal expansion characteristics di ...


8
Anthony S Kewitsch, George Rakuljic, Victor Leyva: Liquid crystal modulator and polarization diversity optics for optical communications. Arroyo Optics, Jones Tullar & Cooper P C, October 5, 2004: US06801310 (8 worldwide citation)

For systems which disperse individual wavelength components of a DWDM beam into an array of converging beams, the individual wavelength signals are modified for blocking, equalization or other purposes by reflective liquid crystal cells. Thus modulated or modified components are then recombined by t ...


9
Victor Leyva, Xian Li Yeh, George Rakuljic: Interleaving optical filter. Arroyo Optics, Jones Tullar & Cooper P C, July 16, 2002: US06421177 (4 worldwide citation)

An optical signal filter for providing a periodic transfer function in transmitting signals within a selected bandwidth, by which passbands are interleavered into groups of separate outputs. The filter employs the transmissivity characteristic of birefringent crystals in conjunction with splitting t ...


10
Sze Keung Kwong, George A Rakuljic, Victor Leyva, Amnon Yariv: Real time optical computing and image processing using self-pumped conjugate mirror. California Institute of Technology, Freilich Hornbaker Rosen & Fernandez, August 9, 1988: US04762394 (4 worldwide citation)

Real time "exclusive or" operation, image subtraction, intensity inversion, and first- and second-order differentiation is achieved by an interferometer with a phase conjugate mirror for retroreflection of two or more beams derived from a single beam by a beam splitter and recombined interferometric ...