Patents by Inventor Abedin Kazi Sarwar

Abedin Kazi Sarwar 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).

  • Optical signal processing circuit
    Patent number: 8086112
    Abstract: An optical gate switch circuit includes: an asymmetric Mach-Zehnder interferometer having an optical path that outputs control light and probe light to a second optical directional coupler via a first optical directional coupler and an optical phase modulation element, and another optical path that connects a third optical directional coupler to which the probe light is input, to the second optical directional coupler via a variable optical attenuator and an optical phase shifter; and a bandpass filter connected to the second optical directional coupler.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: December 27, 2011
    Assignees: National Institute of Information and Communications Technology, National Institute of Advanced Industrial Science and Technology
    Inventors: Hidemi Tsuchida, Hiroshi Ishikawa, Takashi Shimoyama, Abedin Kazi Sarwar, Tetsuya Miyazaki
  • OPTICAL SIGNAL PROCESSING CIRCUIT
    Publication number: 20110211844
    Abstract: An optical gate switch circuit includes: an asymmetric Mach-Zehnder interferometer having an optical path that outputs control light and probe light to a second optical directional coupler via a first optical directional coupler and an optical phase modulation element, and another optical path that connects a third optical directional coupler to which the probe light is input, to the second optical directional coupler via a variable optical attenuator and an optical phase shifter; and a bandpass filter connected to the second optical directional coupler.
    Type: Application
    Filed: September 1, 2010
    Publication date: September 1, 2011
    Applicants: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hidemi TSUCHIDA, Hiroshi ISHIKAWA, Takashi SHIMOYAMA, Abedin Kazi SARWAR, Tetsuya MIYAZAKI
  • Optical signal processing circuit
    Patent number: 7801451
    Abstract: An optical phase modulation circuit includes an optical phase modulation element, an optical bandpass filter, and an optical directional coupler, wherein control light with a wavelength of ?C is coupled with probe light with a wavelength of ?P using the optical directional coupler and input to the optical phase modulation element, the probe light that has been phase modulated by the optical phase modulation element is extracted through the optical band pass filter, and the phase of the probe light is modulated in response to the intensity of the control light.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: September 21, 2010
    Assignees: National Institute of Information and Communications Technology, National Institute of Advanced Industrial Science and Technology
    Inventors: Hidemi Tsuchida, Hiroshi Ishikawa, Takashi Shimoyama, Abedin Kazi Sarwar, Tetsuya Miyazaki
  • OPTICAL SIGNAL PROCESSING CIRCUIT
    Publication number: 20080050124
    Abstract: An optical phase modulation circuit includes an optical phase modulation element, an optical bandpass filter, and an optical directional coupler, wherein control light with a wavelength of ?C is coupled with probe light with a wavelength of ?P using the optical directional coupler and input to the optical phase modulation element, the probe light that has been phase modulated by the optical phase modulation element is extracted through the optical bandpass filter, and the phase of the probe light is modulated in response to the intensity of the control light.
    Type: Application
    Filed: August 22, 2007
    Publication date: February 28, 2008
    Inventors: Hidemi TSUCHIDA, Hiroshi ISHIKAWA, Takashi SHIMOYAMA, Abedin Kazi SARWAR, Tetsuya MIYAZAKI