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:
Dec. 31, 2002
Filed:
Jan. 15, 2002
Akira Furuya, Yamanashi, JP;
Chikashi Anayama, Yamanashi, JP;
Katsumi Sugiura, Yamanashi, JP;
Kensei Nakao, Yamanashi, JP;
Taro Hasegawa, Yamanashi, JP;
Fujitsu Quantum Devices Limited, Yamanashi, JP;
Abstract
In the S -type semiconductor laser, when an angle of a first growth profile line to the first principal plane, the first growth profile line connecting respective lower side lines of an upper inclined plane and a lower inclined plane of the first layer of the first conduction type cladding layer is &thgr; , an angle of a second growth profile line to the first principal plane, the second growth profile line connecting respective lower side lines of an upper inclined plane and a lower inclined plane of the second layer of the first conduction type cladding layer is &thgr; , an angle of a third growth profile line to the first principal plane, the third growth profile line connecting respective lower side lines of an upper inclined plane and a lower inclined plane of the third layer of the first conduction type cladding layer is &thgr; , and an angle of a fourth growth profile line to the first principal plane, the fourth growth profile line connecting respective lower side lines of an upper inclined plane and a lower inclined plane of the fourth layer of the first conduction type cladding layer is &thgr; , relationships &thgr; <&thgr; , &thgr; >&thgr; , &thgr; <&thgr; can be satisfied.