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:
Oct. 25, 1988
Filed:
Feb. 19, 1987
Naoki Chinone, Hachioji, JP;
Shigeo Yamashita, Machida, JP;
Shin'ichi Nakatsuka, Kokubunji, JP;
Akemi Yamanaka, Kodaira, JP;
Yuichi Ono, Tokyo, JP;
Toshihiro Kawano, Ome, JP;
Kazuhisa Uomi, Hachioji, JP;
Takashi Kajimura, Tokyo, JP;
Toshiaki Tanaka, Kokubunji, JP;
Kunio Aiki, Komoro, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A semiconductor laser device having a stripe-shaped active region defined between a pair of end surfaces, at least one of the end surfaces having a curved cross-section in a plane parallel to the active region with a radius of curvature from 10 to 300 .mu.m, the stripe of the active region having such a width that a single transverse mode and a multi-longitudinal mode are allowed. The laser beam emitted from this laser can have little astigmatism and small spot size.