Patents by Inventor Alexei L. Glebov

Alexei L. Glebov 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).

  • Patent number: 8090266
    Abstract: An apparatus comprises one or more electro-optical coupling modules. An electro-optical coupling module comprises a diode, a flexible optical coupling element, a reflective surface, and an optical fiber. The diode performs an electro-optical conversion on a signal. The flexible optical coupling element communicates the signal between the diode and the reflective surface. The reflective surface reflects the signal between the flexible optical coupling element and the optical fiber.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: January 3, 2012
    Assignee: Fujitsu Limited
    Inventors: Alexei L. Glebov, Shigenori Aoki
  • Patent number: 7949217
    Abstract: 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: Grant
    Filed: May 1, 2008
    Date of Patent: May 24, 2011
    Assignee: Fujitsu Limited
    Inventors: Alexei L. Glebov, Vadim I. Smirnov
  • Patent number: 7826747
    Abstract: An optical node for optical burst transport includes optical components operable to transmit and receive optical signals over an optical transmission medium. The optical components include a demultiplexer that is operable to receive a wavelength division multiplexed (WDM) optical signal at an input port and to separate the WDM optical signal into two or more constituent wavelength signals, and a switching matrix that includes one or more electro-optic switches. Each electro-optic switch is operable to receive a wavelength signal and switch the signal to one of two outputs, and the outputs include an output port of the optical node and one or more drop output ports of the optical node.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: November 2, 2010
    Assignee: Fujitsu Limited
    Inventors: Ching-Fong Su, Takeo Hamada, Richard R. Rabbat, Alexei L. Glebov
  • Patent number: 7742666
    Abstract: An optical beam splitter includes an input waveguide, two or more branching arms, two or more fan-out arms, and two or more output waveguides. The input waveguide receives an input light beam. The two or more branching arms are coupled to the input waveguide at a separation point and split the input light beam at the separation point into two or more light beams. Each fan-out arm is coupled to one of the branching arms and fans-out one of the two or more light beams to a predetermined output pitch. Each output waveguide is coupled to one of the fan-out arms and transmits one of the two or more light beams out of the optical beam splitter.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: June 22, 2010
    Assignee: Fujitsu Limited
    Inventors: Michael G. Lee, Alexei L. Glebov, Dashun S. Zhou
  • Publication number: 20100054655
    Abstract: An optical interconnect system includes an integrated circuit, at least one optical modulator, and a slab waveguide. The optical modulator is coupled to the integrated circuit and receives an input light beam from a light source and data from a source device and generates a modulated output light beam. The slab waveguide is coupled to the optical modulator and includes at least one input waveguide microlens, a plurality of output waveguide microlenses, and at least one deflector prism. The input waveguide microlens focuses the modulated output light beam from the modulator into a collimated light beam. The deflector prism is coupled to the integrated circuit, receives the collimated light beam from the input waveguide microlens, and deflects the collimated light beam toward one of the output waveguide microlenses according to an input voltage.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 4, 2010
    Applicant: Fujitsu Limited
    Inventors: Alexei L. Glebov, Michael G. Lee
  • Publication number: 20100046879
    Abstract: An optical modulator includes an input waveguide, a splitting point, a first interaction arm of length L1, a second interaction arm of length L2 that is unequal in length to the first interaction arm, a recombination point, and an output waveguide. The splitting point receives an incoming continuous wave light beam comprising two or more wavelengths of light from the input waveguide and splits it into a first light beam and a second light beam. The first interaction arm is coupled to the input waveguide and transports the first light beam. The second interaction arm is coupled to the input waveguide and transports the second light beam. The output waveguide is coupled to the first interaction arm and second interaction arm at the recombination point and combines the first light beam and second light beam into an output modulated light beam. The first interaction arm and the second interaction arm comprise an electro-optic material with a refractive index that changes according to a modulation stimulus.
    Type: Application
    Filed: August 25, 2008
    Publication date: February 25, 2010
    Applicant: Fujitsu Limited
    Inventors: Michael G. Lee, Alexei L. Glebov, Dashun Steve Zhou
  • Publication number: 20100046890
    Abstract: An optical beam splitter includes an input waveguide, two or more branching arms, two or more fan-out arms, and two or more output waveguides. The input waveguide receives an input light beam. The two or more branching arms are coupled to the input waveguide at a separation point and split the input light beam at the separation point into two or more light beams. Each fan-out arm is coupled to one of the branching arms and fans-out one of the two or more light beams to a predetermined output pitch. Each output waveguide is coupled to one of the fan-out arms and transmits one of the two or more light beams out of the optical beam splitter.
    Type: Application
    Filed: August 25, 2008
    Publication date: February 25, 2010
    Applicant: Fujitsu Limited
    Inventors: Michael G. Lee, Alexei L. Glebov, Dashun Steve Zhou
  • Publication number: 20100034497
    Abstract: An optical assembly is provided that includes a substrate. The substrate has a set of one or more optical waveguides. A component is coupled to and spaced apart from the substrate by at least one or more mechanical supports. The component has one or more photodetectors. A set of one or more flexible optical pillars is disposed to be positioned between the set of optical waveguides and the photodetectors. The set of flexible optical pillars is optically transmissive and configured to transmit light from the set of optical waveguides to the photodetectors.
    Type: Application
    Filed: August 5, 2008
    Publication date: February 11, 2010
    Applicant: Fujitsu Limited
    Inventors: Alexei L. Glebov, Michael G. Lee
  • Publication number: 20090274409
    Abstract: 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: Application
    Filed: May 1, 2008
    Publication date: November 5, 2009
    Inventors: Alexei L. Glebov, Vadim I. Smirnov
  • Publication number: 20090136236
    Abstract: An apparatus comprises one or more electro-optical coupling modules. An electro-optical coupling module comprises a diode, a flexible optical coupling element, a reflective surface, and an optical fiber. The diode performs an electro-optical conversion on a signal. The flexible optical coupling element communicates the signal between the diode and the reflective surface. The reflective surface reflects the signal between the flexible optical coupling element and the optical fiber.
    Type: Application
    Filed: November 26, 2007
    Publication date: May 28, 2009
    Applicant: Fujitsu Limited
    Inventors: Alexei L. Glebov, Shigenori Aoki
  • Patent number: 7529442
    Abstract: In one embodiment, an apparatus includes a passive element including one or more first waveguides and one or more second waveguides. The apparatus also includes an active element integrated into the passive element. The active element includes one or more third waveguides that actively guide light from the first waveguides to the second waveguides. The third waveguides include polarization-independent electro-optical (EO) thin film.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: May 5, 2009
    Assignee: Fujitsu Limited
    Inventors: Alexei L. Glebov, Takeo Hamada
  • Patent number: 7403672
    Abstract: A method for creating an integrated linear polarizer is provided. An electro-optical component is fabricated and may include a bottom electrode, a bottom cladding layer, side cladding features, an electro-optic polymer layer, a top cladding layer, and a top electrode. After fabrication, the electro-optical component is poled to create or enhance polarization properties of the electro-optic polymer layer. The electro-optical component may be heated to at least a first threshold temperature. An electric field may then be applied to the electro-optical component. In the presence of the electric field, the electro-optical component may be cooled to at or below a second threshold temperature that is less than the first threshold temperature. Once the electro-optical component has cooled to the second threshold temperature, the electric field may be removed.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: July 22, 2008
    Assignee: Fujitsu Limited
    Inventors: Dashun Steve Zhou, Michael G. Lee, Alexei L. Glebov
  • Publication number: 20080144161
    Abstract: A method for creating an integrated linear polarizer is provided. An electro-optical component is fabricated and may include a bottom electrode, a bottom cladding layer, side cladding features, an electro-optic polymer layer, a top cladding layer, and a top electrode. After fabrication, the electro-optical component is poled to create or enhance polarization properties of the electro-optic polymer layer. The electro-optical component may be heated to at least a first threshold temperature. An electric field may then be applied to the electro-optical component. In the presence of the electric field, the electro-optical component may be cooled to at or below a second threshold temperature that is less than the first threshold temperature. Once the electro-optical component has cooled to the second threshold temperature, the electric field may be removed.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: Dashun Steve Zhou, Michael G. Lee, Alexei L. Glebov
  • Publication number: 20080124077
    Abstract: An optical node for optical burst transport includes optical components operable to transmit and receive optical signals over an optical transmission medium. The optical components include a demultiplexer that is operable to receive a wavelength division multiplexed (WDM) optical signal at an input port and to separate the WDM optical signal into two or more constituent wavelength signals, and a switching matrix that includes one or more electro-optic switches. Each electro-optic switch is operable to receive a wavelength signal and switch the signal to one of two outputs, and the outputs include an output port of the optical node and one or more drop output ports of the optical node.
    Type: Application
    Filed: November 27, 2006
    Publication date: May 29, 2008
    Inventors: Ching-Fong Su, Takeo Hamada, Richard R. Rabbat, Alexei L. Glebov
  • Patent number: 7343054
    Abstract: An integrated electro-optic module may contain a continuous layer of electro-optic polymer through both a splitter portion and a modulator portion in order to facilitate high speed data transmission. The integrated electro-optic module may be fabricated by depositing a bottom cladding layer on a wafer, creating side cladding features, depositing the electro-optic polymer, and coating with a top cladding layer. The electro-optic polymer in both the splitter portion and modulator portion of the integrated electro-optic module may create inverted-ridge waveguide structures. The waveguide in the splitter portion may have a first ridge depth, and the waveguide in the modulator portion may have a second ridge depth, the first ridge depth greater than the second ridge depth.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: March 11, 2008
    Assignee: Fujitsu Limited
    Inventors: Michael G. Lee, Alexei L. Glebov, Dashun Steve Zhou
  • Publication number: 20080056638
    Abstract: In one embodiment, an apparatus includes a passive element including one or more first waveguides and one or more second waveguides. The apparatus also includes an active element integrated into the passive element. The active element includes one or more third waveguides that actively guide light from the first waveguides to the second waveguides. The third waveguides include polarization-independent electro-optical (EO) thin film.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 6, 2008
    Inventors: Alexei L. Glebov, Takeo Hamada