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:
May. 20, 2003
Filed:
Oct. 03, 2000
Junji Yoshida, Tokyo, JP;
Naoki Tsukiji, Tokyo, JP;
Akira Iketani, Tokyo, JP;
Naoki Kimura, Tokyo, JP;
Jun Niekawa, Tokyo, JP;
Toshio Kimura, Tokyo, JP;
Takeshi Aikiyo, Tokyo, JP;
Abstract
In the semiconductor laser device of the present invention, a semiconductor stacked structure including an active layer comprising a strained multi-quantum well structure is formed on a substrate a cavity length is larger than 1000 &mgr;m but equal to or smaller than 1800 &mgr;m, and a low-reflection film S having a reflectance of 3% or less is formed on one facet and a high-reflection film S having a reflectance of 90% or more is formed on the other facet. The semiconductor laser module has a structure in which the semiconductor laser device is set to a cooling device constituted by electrically alternately arranging 40 pairs or more of the Peltier elements and holding them by top and bottom ceramic plates and sealed in the package. A grating having a reflection bandwidth of 1.5 nm or less is formed on an optical fiber to be built in.