Patents by Inventor Yamato IWAMA

Yamato IWAMA 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 transmission device, optical transmission system, and optical transmission method
    Patent number: 10979146
    Abstract: An optical transmission device includes a light source that is driven according to a multicarrier modulation signal in which data is allocated to a plurality of subcarriers to transmit an optical multicarrier modulation signal to another optical transmission device, and a control unit that controls a driving condition of the light source, based on the number of bits allocatable to each of the subcarriers of the multicarrier modulation signal, the number of bits being determined according to transmission characteristics of the optical multicarrier modulation signal in the other optical transmission device.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: April 13, 2021
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Yamato Iwama, Mai Luan Nguyen, Masato Nishihara, Toshiki Tanaka
  • OPTICAL TRANSMISSION DEVICE, OPTICAL TRANSMISSION SYSTEM, AND OPTICAL TRANSMISSION METHOD
    Publication number: 20200177281
    Abstract: An optical transmission device includes a light source that is driven according to a multicarrier modulation signal in which data is allocated to a plurality of subcarriers to transmit an optical multicarrier modulation signal to another optical transmission device, and a control unit that controls a driving condition of the light source, based on the number of bits allocatable to each of the subcarriers of the multicarrier modulation signal, the number of bits being determined according to transmission characteristics of the optical multicarrier modulation signal in the other optical transmission device.
    Type: Application
    Filed: October 29, 2019
    Publication date: June 4, 2020
    Applicant: Fujitsu Optical Components Limited
    Inventors: Yamato IWAMA, Mai Luan Nguyen, Masato Nishihara, Toshiki Tanaka