Patents by Inventor Ryoji NAGASE

Ryoji NAGASE 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 transmitter and optical transmission apparatus
    Patent number: 8843001
    Abstract: An optical transmitter is disclosed. An optical modulator outputs an optical signal by modulating light being input, and has an optical absorption characteristic which changes a degree of optical absorption depending on a bias voltage being applied and includes a first characteristic region and a second characteristic region in which the degree of the optical absorption is greater than the first characteristic region. An power source applies an electric field generated by applying a predetermined shutdown bias voltage corresponding to the second characteristic region to electrodes provided in two interference optical guides formed in the optical modulator, when an output of the optical signal from the optical modulator is shut down to be less than or equal to a desired amount.
    Type: Grant
    Filed: October 30, 2011
    Date of Patent: September 23, 2014
    Assignee: Fujitsu Optical Components Limited
    Inventor: Ryoji Nagase
  • OPTICAL TRANSMITTER AND OPTICAL TRANSMISSION APPARATUS
    Publication number: 20120106979
    Abstract: An optical transmitter is disclosed. An optical modulator outputs an optical signal by modulating light being input, and has an optical absorption characteristic which changes a degree of optical absorption depending on a bias voltage being applied and includes a first characteristic region and a second characteristic region in which the degree of the optical absorption is greater than the first characteristic region. An power source applies an electric field generated by applying a predetermined shutdown bias voltage corresponding to the second characteristic region to electrodes provided in two interference optical guides formed in the optical modulator, when an output of the optical signal from the optical modulator is shut down to be less than or equal to a desired amount.
    Type: Application
    Filed: October 30, 2011
    Publication date: May 3, 2012
    Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Ryoji NAGASE