Patents by Inventor Renfeng Gao

Renfeng Gao 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: 7130517
    Abstract: A planar optical waveguide is provided. The planar optical waveguide includes a polymer substrate having a coefficient of thermal expansion, a first cladding disposed on the substrate, and a core disposed on at least a portion of the first cladding. The core is a halogenated polymer having an absorptive optical loss of less than approximately 2.5×10?4 dB/cm in the range from about 1250 to 1700 nm. The core has a thermo-optic coefficient and a refractive index, a product of the thermo-optic coefficient and the reciprocal of the refractive index being approximately equal to the negative of the coefficient of thermal expansion.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: October 31, 2006
    Assignee: Photon X, LLC
    Inventors: Anthony Garito, Renyuan Gao, Renfeng Gao, Yu-Ling Hsiao, Kazuya Takayama, Aydin Yeniay
  • Patent number: 6876796
    Abstract: A microresonator is provided that incorporates a composite material comprising a polymer matrix and nanoparticles dispersed therein. The microresonator includes the composite material having a shape that is bounded at least in part by a reflecting surface. The shape of the microresonator allows a discrete electromagnetic frequency to set up a standing wave mode. Advantageously, the polymer matrix comprises at least one halogenated polymer and the dispersed nanoparticles comprise an outer coating layer, which may also comprise a halogenated polymer. Methods for making composite materials and microresonators are also provided. Applications include, for example, active and passive switches, add/drop filters, modulators, isolators, and integrated optical switch array circuits.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: April 5, 2005
    Assignee: Photon-X, LLC
    Inventors: Anthony F. Garito, Renyuan Gao, Renfeng Gao, Yu-Ling Hsiao, Jingsong Zhu
  • Patent number: 6857276
    Abstract: A temperature controller module for electronically controlling the temperature of a device, such as a pump laser or laser diode, controls the device temperature based on low heat dissipation inductors and current sources. The temperature controller module shuts off the thermoelectric cooler when the temperature of the laser exceeds a predetermined amount. Further, the temperature controller module is integrated in a compact, self-contained modular form to allow use in space critical applications.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: February 22, 2005
    Assignee: Photon-X, LLC
    Inventors: John Finn, Renfeng Gao, Renyuan Gao, Joseph Chang
  • Publication number: 20050031291
    Abstract: An optical assembly has two mechanically matched substrates, each substrate including structures, such as circuits and circuit elements, that are in shapes complementary to the structures on the other substrate. At least one substrate includes a clipgate for at least one optical component.
    Type: Application
    Filed: March 24, 2004
    Publication date: February 10, 2005
    Inventors: Renfeng Gao, Anthony Garito, Aydin Yeniay
  • Publication number: 20040150268
    Abstract: A microresonator is provided that incorporates a composite material comprising a polymer matrix and nanoparticles dispersed therein. The microresonator includes the composite material having a shape that is bounded at least in part by a reflecting surface. The shape of the microresonator allows a discrete electromagnetic frequency to set up a standing wave mode. Advantageously, the polymer matrix comprises at least one halogenated polymer and the dispersed nanoparticles comprise an outer coating layer, which may also comprise a halogenated polymer. Methods for making composite materials and microresonators are also provided. Applications include, for example, active and passive switches, add/drop filters, modulators, isolators, and integrated optical switch array circuits.
    Type: Application
    Filed: January 30, 2003
    Publication date: August 5, 2004
    Inventors: Anthony F. Garito, Renyuan Gao, Renfeng Gao, Yu-Ling Hsiao, Jingsong Zhu
  • Publication number: 20030223673
    Abstract: A multifunctional integrated optical waveguide is provided. The planar optical waveguide structure includes an active gain medium for optical amplification, and a passive component(s) (i.e. arrayed waveguide grating, splitter, and tap) for processing the signal (i.e. multiplexing, demultiplexing, monitoring, add-dropping, routing and splits) on a solid substrate.
    Type: Application
    Filed: March 17, 2003
    Publication date: December 4, 2003
    Inventors: Anthony F. Garito, Renyuan Gao, Renfeng Gao, Aydin Yeniay, Kazuya Takayama, Yu-Ling Hsiao, Robert Norwood
  • Publication number: 20030224214
    Abstract: The present invention relates to composite materials comprising a host matrix, and a plurality of magneto-optic nanoparticles within the host matrix, a process of forming a composite material comprising coating a plurality of magneto-optic nanoparticles with at least one polymer layer, and dispersing the plurality of coated nanoparticles into a host matrix material, and thin-film magneto-optic articles, and optical components, such as integrated optical components, as well as optical devices, such as optical rotators, such as Faraday rotators, optical isolators, optical circulators, optical modulators, waveguides, and amplifiers, comprising the composite material according to the present invention.
    Type: Application
    Filed: March 17, 2003
    Publication date: December 4, 2003
    Inventors: Anthony F. Garito, Renyuan Gao, Renfeng Gao, Yu-Ling Hsiao, Brian Thomas
  • Publication number: 20030180029
    Abstract: A solid substrate comprising a first major surface, a second major surface juxtaposed from and parallel or substantially parallel to the first major surface, wherein the substrate has a plurality of surface relief structures, located on the substrate between the first and second major surfaces, and extending over the substrate; wherein the solid substrate comprises a host matrix, and at least one nanoparticle within the host matrix.
    Type: Application
    Filed: March 17, 2003
    Publication date: September 25, 2003
    Inventors: Anthony F. Garito, Yu-Ling Hsiao, Renyuan Gao, Renfeng Gao, Joseph Chang, Donald Bitting, Kazuya Takayama, Jaya Sharma, Jingsong Zhu, Brian Thomas, Anna Panackal
  • Publication number: 20030174994
    Abstract: The present invention is directed to a composite material comprising a nanoporous polymer matrix and a plurality of nanoparticles dispersed within said matrix, wherein the nanoparticles possess specified thermal properties. The resulting nanoporous polymer nanocomposite is an optical medium with tunable and controllable thermal properties, including the coefficient of thermal expansion (CTE), the thermal conductivity, and the thermooptic coefficient.
    Type: Application
    Filed: February 19, 2003
    Publication date: September 18, 2003
    Inventors: Anthony F. Garito, Yu-Ling Hsiao, Renyuan Gao, Renfeng Gao
  • Publication number: 20030175004
    Abstract: A composite material that includes a host matrix and a plurality of dispersed nanoparticles within the host matrix. Each of the plurality of nanoparticles may include a halogenated outer coating layer that seals the nanoparticle and prevents agglomeration of the nanoparticles within the host matrix. The invention also includes a process of forming the composite material. Depending on the nanoparticle material, the composite material may have various applications including, but not limited to, optical devices, windowpanes, mirrors, mirror panels, optical lenses, optical lens arrays, optical displays, liquid crystal displays, cathode ray tubes, optical filters, optical components, all these more generally referred to as components.
    Type: Application
    Filed: February 19, 2003
    Publication date: September 18, 2003
    Inventors: Anthony F. Garito, Yu-Ling Hsiao, Renyuan Gao, Jingsong Zhu, Brian Thomas, Anna Panackal, Jaya Sharma, Renfeng Gao
  • Publication number: 20030154726
    Abstract: A temperature controller module for electronically controlling the temperature of a device, such as a pump laser or laser diode, controls the device temperature based on low heat dissipation inductors and current sources. The temperature controller module shuts off the thermoelectric cooler when the temperature of the laser exceeds a predetermined amount. Further, the temperature controller module is integrated in a compact, self-contained modular form to allow use in space critical applications.
    Type: Application
    Filed: January 8, 2003
    Publication date: August 21, 2003
    Inventors: John Finn, Renfeng Gao, Renyuan Gao, Joseph Chang
  • Publication number: 20030123828
    Abstract: A planar optical waveguide is provided. The planar optical waveguide includes a polymer substrate having a coefficient of thermal expansion, a first cladding disposed on the substrate, and a core disposed on at least a portion of the first cladding. The core is a halogenated polymer having an absorptive optical loss of less than approximately 2.5×1031 ∝dB/cm in the range from about 1250 to 1700 nm. The core has a thermo-optic coefficient and a refractive index, a product of the thermo-optic coefficient and the reciprocal of the refractive index being approximately equal to the negative of the coefficient of thermal expansion.
    Type: Application
    Filed: September 16, 2002
    Publication date: July 3, 2003
    Inventors: Anthony Garito, Renyuan Gao, Renfeng Gao, Yu-Ling Hsiao, Kazuya Takayama, Aydin Yeniay
  • Publication number: 20030058906
    Abstract: A system and method for electronically controlling the temperature of a pump laser or laser diode controls temperature uses methods of sourcing drive current. Further, the system shuts off the laser diode and/or a thermoelectric cooler when the temperature of the pump laser exceeds a predetermined amount.
    Type: Application
    Filed: August 5, 2002
    Publication date: March 27, 2003
    Inventors: John Finn, Renfeng Gao, Chia-Chi Teng
  • Publication number: 20020186952
    Abstract: An optical amplifier module is disclosed. The optical amplifier module includes a housing having an interior length and an interior width generally shorter than the interior length and an electronic control board disposed within the housing. The electronic control board includes a plurality of electronically connected components. The optical amplifier module also includes a gain medium disposed in the housing in a generally circularly spiral shape, such that the gain medium has a radius of curvature approximately one half the interior width of the housing. The optical amplifier module further includes a pump laser electronically connected to the electronic control board and optically connected to the gain medium.
    Type: Application
    Filed: June 8, 2001
    Publication date: December 12, 2002
    Applicant: Photon-X, Inc.
    Inventors: Renfeng Gao, Renyuan Gao
  • Publication number: 20020186458
    Abstract: A controllable optical amplifier module is disclosed. The controllable optical amplifier module includes a signal line. The signal line includes an input for receiving an input signal, an output for discharging an amplified signal such that the output is optically connected to the input, a gain medium optically disposed between the input and the output, and a first tap for generating a first tapped signal such that the first tap is optically disposed between the input and the output. The controllable optical amplifier module also includes at least one pump laser having a laser output optically connected to the gain medium and an ability to adjustably alter the intensity of the amplified signal. A method of adjustably amplifying an optical signal is also disclosed.
    Type: Application
    Filed: June 8, 2001
    Publication date: December 12, 2002
    Applicant: Photon-X, Inc.
    Inventors: Renyuan Gao, Renfeng Gao
  • Patent number: 6483978
    Abstract: An optical amplifier module is disclosed. The optical amplifier module includes a housing having an interior length and an interior width generally shorter than the interior length and an electronic control board disposed within the housing. The electronic control board includes a plurality of electronically connected components. The optical amplifier module also includes a gain medium disposed in the housing in a generally circularly spiral shape, such that the gain medium has a radius of curvature approximately one half the interior width of the housing. The optical amplifier module further includes a pump laser electronically connected to the electronic control board and optically connected to the gain medium.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: November 19, 2002
    Assignee: Photon-X, Inc.
    Inventors: Renfeng Gao, Renyuan Gao
  • Patent number: D463414
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: September 24, 2002
    Assignee: Photon-X, Inc.
    Inventor: Renfeng Gao
  • Patent number: D476977
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: July 8, 2003
    Assignee: Photon-X, Inc.
    Inventors: Renfeng Gao, Joseph Chang