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:
Apr. 08, 1997
Filed:
Dec. 23, 1994
Hideyoshi Horie, Ushiku, JP;
Yuichi Inoue, Ushiku, JP;
Kenji Shimoyama, Ushiku, JP;
Nobuyuki Hosoi, Ushiku, JP;
Goto Hideki, Ushiku, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
The disclosure described a semiconductor laser diode comprising at least a first clad layer, an active layer and a second clad layer disposed in this order on the substrate, and a buried layer for current blocking disposed at both sides in the cavity direction of the active layer, at least one of the first clad layer and second clad layer having at least one superlattice in the direction parallel with the substrate, and the average refractive index (nc1) of the first clad layer, the refractive index (na) of the active layer and the average refractive index (nc2) of the second clad layer satisfying the following equations.