Patents by Inventor Noboru Sonetsuji

Noboru Sonetsuji 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).

  • Laser diode module
    Patent number: 6490303
    Abstract: Disclosed herein is a laser diode module having a thermoelectric cooling element, a laser diode, and a thermistor in a housing. The thermoelectric cooling element has a first surface and a second surface between which heat exchange is performed. The first surface is in close contact with an inner surface of the housing. A base is provided on the second surface in close contact therewith. A laser carrier and a thermistor carrier are provided on the base in close contact therewith. The laser diode and the thermistor are provided on the laser carrier and the thermistor carrier in close contact therewith, respectively. A portion of the base in the vicinity of the laser carrier is thermally connected to the housing by a metal plate, for example, thereby allowing high-precision temperature control of the laser diode.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: December 3, 2002
    Assignee: Fujitsu Limited
    Inventors: Manabu Komiyama, Shunichi Sato, Noboru Sonetsuji, Tetsuo Ishizaka, Saeko Yokoi
  • Semiconductor laser module
    Patent number: 5751877
    Abstract: A semiconductor laser module includes a semiconductor laser assembly formed by containing a semiconductor laser in a package, a lens assembly fixed by welding to the package of the semiconductor laser assembly, and a fiber assembly fixed by welding to the lens assembly. The semiconductor laser assembly includes a base fixed to the package and a carrier fixed to the base. The semiconductor laser is mounted on the carrier. A lens holder of the lens assembly is spot-welded to the package at a plurality of positions set below the upper surface of the base.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: May 12, 1998
    Assignee: Fujitsu Limited
    Inventors: Tetsuo Ishizaka, Toshio Ohya, Shunichi Satoh, Noboru Sonetsuji, Manabu Komiyama
  • Laser diode module
    Patent number: 5703893
    Abstract: Disclosed herein is a laser diode module having a thermoelectric cooling element, a laser diode, and a thermistor in a housing. The thermoelectric cooling element has a first surface and a second surface between which heat exchange is performed. The first surface is in close contact with an inner surface of the housing. A base is provided on the second surface in close contact therewith. A laser carrier and a thermistor carrier are provided on the base in close contact therewith. The laser diode and the thermistor are provided on the laser carrier and the thermistor carrier in close contact therewith, respectively. A portion of the base in the vicinity of the laser carrier is thermally connected to the housing by a metal plate, for example, thereby allowing high-precision temperature control of the laser diode.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: December 30, 1997
    Assignee: Fujitsu Limited
    Inventors: Manabu Komiyama, Shunichi Sato, Noboru Sonetsuji, Tetsuo Ishizaka, Saeko Yokoi
  • Light emitting element drive system
    Patent number: 4149071
    Abstract: In a system in which a light emitting element such as a semiconductor laser, light emitting diode or the like is modulated directly by a drive current corresponding to an input modulation signal, the drive current is selected to correspond to an integrated value of the input modulation signal, thereby compensating for deterioration of the modulation characteristic based on a thermal effect in the light emitting element to obtain a desired optical output waveform.
    Type: Grant
    Filed: May 3, 1977
    Date of Patent: April 10, 1979
    Assignee: Fujitsu Limited
    Inventors: Yasuo Nagai, Takashi Touge, Matazou Yamagata, Noboru Sonetsuji