Patents by Inventor Yuichi Thomori

Yuichi Thomori 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 amplifier
    Patent number: 7262905
    Abstract: An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: August 28, 2007
    Assignee: Nippon Telegraph & Telephone Corporation
    Inventors: Yasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori
  • Optical amplifier
    Patent number: 7221500
    Abstract: An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: May 22, 2007
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori
  • Optical amplifier
    Publication number: 20060268399
    Abstract: An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
    Type: Application
    Filed: June 14, 2006
    Publication date: November 30, 2006
    Inventors: Yasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori
  • Optical amplifier
    Publication number: 20060232851
    Abstract: An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
    Type: Application
    Filed: June 14, 2006
    Publication date: October 19, 2006
    Inventors: Yasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori
  • Optical amplifier
    Patent number: 7088501
    Abstract: An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: August 8, 2006
    Assignee: Nippon Telegraph & Telephone Corporation
    Inventors: Yasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori
  • Optical amplifier
    Publication number: 20030067678
    Abstract: An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
    Type: Application
    Filed: October 3, 2002
    Publication date: April 10, 2003
    Inventors: Yasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori