The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2007
Filed:
Jun. 14, 2006
Yasuo Shibata, Tokyo, JP;
Nobuhiro Kikuchi, Kanagawa, JP;
Hiromi Oohashi, Kanagawa, JP;
Yuichi Thomori, Kanagawa, JP;
Yasuo Shibata, Tokyo, JP;
Nobuhiro Kikuchi, Kanagawa, JP;
Hiromi Oohashi, Kanagawa, JP;
Yuichi Thomori, Kanagawa, JP;
Nippon Telegraph & Telephone Corporation, Tokyo, JP;
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.