Patents by Inventor Makoto NASHIMOTO

Makoto NASHIMOTO 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).

  • Communication system, communication device, and communication method
    Patent number: 8630538
    Abstract: A communication system includes a transmitter that combines and transmits a first signal light and a dummy light having a wavelength different from the first signal light; a first amplifier that amplifies a light transmitted by the transmitter to a constant power; a communication device that separates the dummy light from the light amplified by the first amplifier, has a variable transmittance and allows the separated dummy light to pass through, and combines and transmits the passed dummy light and a second signal light having a wavelength different from the dummy light; a second amplifier that amplifies a light transmitted by the communication device to a constant power; a receiver that receives the second signal light included in the light amplified by the second amplifier; and a controller that controls the transmittance.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: January 14, 2014
    Assignee: Fujitsu Limited
    Inventors: Makoto Nashimoto, Kenji Ota
  • COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION METHOD
    Publication number: 20120243879
    Abstract: A communication system includes a transmitter that combines and transmits a first signal light and a dummy light having a wavelength different from the first signal light; a first amplifier that amplifies a light transmitted by the transmitter to a constant power; a communication device that separates the dummy light from the light amplified by the first amplifier, has a variable transmittance and allows the separated dummy light to pass through, and combines and transmits the passed dummy light and a second signal light having a wavelength different from the dummy light; a second amplifier that amplifies a light transmitted by the communication device to a constant power; a receiver that receives the second signal light included in the light amplified by the second amplifier; and a controller that controls the transmittance.
    Type: Application
    Filed: January 31, 2012
    Publication date: September 27, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Makoto NASHIMOTO, Kenji OTA