Patents by Inventor Atushi Tajiri

Atushi Tajiri 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).

  • Semiconductor laser with a self sustained pulsation
    Patent number: 5610096
    Abstract: A semiconductor laser with a self-sustained pulsation is disclosed in which a first cladding layer of first conductive type, an active layer and a second cladding layer of second conductive type having a striped ridge are formed in that order on a semiconductor substrate of first conductive type. The first and second cladding layers have a refractive index smaller than and a band gap larger than the active layer. A saturable optical absorbing layer having a band gap of energy substantially equal to the energy corresponding to lasing wavelength is formed in both the first and second cladding layers. Further, a barrier layer having a refractive index smaller than and a band gap larger than the first and second cladding layers is formed between the first cladding layer and the active layer and/or between the active layer and the second cladding layer.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: March 11, 1997
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiichi Yodoshi, Akira Ibaraki, Masayuki Shono, Shoji Honda, Takatoshi Ikegami, Nobuhiko Hayashi, Koutarou Furusawa, Atushi Tajiri, Toru Ishikawa, Kenichi Matsukawa, Teruaki Miyake, Takenori Goto, Mitsuaki Matsumoto, Daisuke Ide, Yasuyuki Bessho
  • Method of making a semiconductor laser with a self-sustained pulsation
    Patent number: 5506170
    Abstract: A semiconductor laser with a self-sustained pulsation is disclosed in which a first cladding layer of first conductive type, an active layer and a second cladding layer of second conductive type having a striped ridge are formed in that order on a semiconductor substrate of first conductive type. The first and second cladding layers have a refractive index smaller than and a band gap larger than the active layer. A saturable optical absorbing layer having a band gap of energy substantially equal to the energy corresponding to lasing wavelength is formed in both the first and second cladding layers. Further, a barrier layer having a refractive index smaller than and a band gap larger than the first and second cladding layers is formed between the first cladding layer and the active layer and/or between the active layer and the second cladding layer.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: April 9, 1996
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiichi Yodoshi, Akira Ibaraki, Masayuki Shono, Shoji Honda, Takatoshi Ikegami, Nobuhiko Hayashi, Koutarou Furusawa, Atushi Tajiri, Toru Ishikawa, Kenichi Matsukawa, Teruaki Miyake, Takenori Goto, Mitsuaki Matsumoto, Daisuke Ide, Yasuyuki Bessho
  • Semiconductor laser with a self-sustained pulsation
    Patent number: 5416790
    Abstract: A semiconductor laser with a self-sustained pulsation is disclosed in which a first cladding layer of first conductive type, an active layer and a second cladding layer of second conductive type having a striped ridge are formed in that order on a semiconductor substrate of first conductive type. The first and second cladding layers have a refractive index smaller than and a band gap larger than the active layer. A saturable optical absorbing layer having a band gap of energy substantially equal to the energy corresponding to lasing wavelength is formed in both the first and second cladding layers. Further, a barrier layer having a refractive index smaller than and a band gap larger than the first and second cladding layers is formed between the first cladding layer and the active layer and/or between the active layer and the second cladding layer.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: May 16, 1995
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiichi Yodoshi, Akira Ibaraki, Masayuki Shono, Shoji Honda, Takatoshi Ikegami, Nobuhiko Hayashi, Koutarou Furusawa, Atushi Tajiri, Toru Ishikawa, Kenichi Matsukawa, Teruaki Miyake, Takenori Goto, Mitsuaki Matsumoto, Daisuke Ide, Yasuyuki Bessho