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).
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Patent number: 8090266Abstract: 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: GrantFiled: November 26, 2007Date of Patent: January 3, 2012Assignee: Fujitsu LimitedInventors: Alexei L. Glebov, Shigenori Aoki
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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: 7826747Abstract: 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: GrantFiled: November 27, 2006Date of Patent: November 2, 2010Assignee: Fujitsu LimitedInventors: Ching-Fong Su, Takeo Hamada, Richard R. Rabbat, Alexei L. Glebov
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Patent number: 7742666Abstract: 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: GrantFiled: August 25, 2008Date of Patent: June 22, 2010Assignee: Fujitsu LimitedInventors: Michael G. Lee, Alexei L. Glebov, Dashun S. Zhou
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Publication number: 20100054655Abstract: 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: ApplicationFiled: August 28, 2008Publication date: March 4, 2010Applicant: Fujitsu LimitedInventors: Alexei L. Glebov, Michael G. Lee
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Publication number: 20100046879Abstract: 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: ApplicationFiled: August 25, 2008Publication date: February 25, 2010Applicant: Fujitsu LimitedInventors: Michael G. Lee, Alexei L. Glebov, Dashun Steve Zhou
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Publication number: 20100046890Abstract: 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: ApplicationFiled: August 25, 2008Publication date: February 25, 2010Applicant: Fujitsu LimitedInventors: Michael G. Lee, Alexei L. Glebov, Dashun Steve Zhou
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Publication number: 20100034497Abstract: 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: ApplicationFiled: August 5, 2008Publication date: February 11, 2010Applicant: Fujitsu LimitedInventors: Alexei L. Glebov, Michael G. Lee
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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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Publication number: 20090136236Abstract: 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: ApplicationFiled: November 26, 2007Publication date: May 28, 2009Applicant: Fujitsu LimitedInventors: Alexei L. Glebov, Shigenori Aoki
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Patent number: 7529442Abstract: 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: GrantFiled: August 31, 2006Date of Patent: May 5, 2009Assignee: Fujitsu LimitedInventors: Alexei L. Glebov, Takeo Hamada
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Patent number: 7403672Abstract: 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: GrantFiled: December 15, 2006Date of Patent: July 22, 2008Assignee: Fujitsu LimitedInventors: Dashun Steve Zhou, Michael G. Lee, Alexei L. Glebov
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Publication number: 20080144161Abstract: 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: ApplicationFiled: December 15, 2006Publication date: June 19, 2008Inventors: Dashun Steve Zhou, Michael G. Lee, Alexei L. Glebov
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Publication number: 20080124077Abstract: 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: ApplicationFiled: November 27, 2006Publication date: May 29, 2008Inventors: Ching-Fong Su, Takeo Hamada, Richard R. Rabbat, Alexei L. Glebov
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Patent number: 7343054Abstract: 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: GrantFiled: January 4, 2007Date of Patent: March 11, 2008Assignee: Fujitsu LimitedInventors: Michael G. Lee, Alexei L. Glebov, Dashun Steve Zhou
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Publication number: 20080056638Abstract: 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: ApplicationFiled: August 31, 2006Publication date: March 6, 2008Inventors: Alexei L. Glebov, Takeo Hamada