Patents by Inventor Tomotaka Otani

Tomotaka Otani 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 amplifier module and dispersion compensation fiber loss detection method
    Patent number: 8477030
    Abstract: An optical amplifier module includes a first optical amplifier to amplify main signal light to be supplied to a dispersion compensation fiber (DCF), a second optical amplifier to amplify the main signal light supplied from the DCF, a generating part to generate monitoring light having a wavelength longer than a wavelength of the main signal light, a multiplexing part to multiplex the monitoring light generated by the generating part and the main signal light to be supplied to the DCF, a demultiplexing part to demultiplex the monitoring light from the main signal light supplied from the DCF, and a detection part to detect a light intensity of the monitoring light demultiplexed by the demultiplexing part.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 2, 2013
    Assignee: Fujitsu Limited
    Inventors: Tomotaka Otani, Toshihiro Ohtani
  • Optical amplifier module and dispersion compensation fiber loss detection method
    Publication number: 20100271204
    Abstract: An optical amplifier module includes a first optical amplifier to amplify main signal light to be supplied to a dispersion compensation fiber (DCF), a second optical amplifier to amplify the main signal light supplied from the DCF, a generating part to generate monitoring light having a wavelength longer than a wavelength of the main signal light, a multiplexing part to multiplex the monitoring light generated by the generating part and the main signal light to be supplied to the DCF, a demultiplexing part to demultiplex the monitoring light from the main signal light supplied from the DCF, and a detection part to detect a light intensity of the monitoring light demultiplexed by the demultiplexing part.
    Type: Application
    Filed: March 31, 2010
    Publication date: October 28, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Tomotaka Otani, Toshihiro Ohtani