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:
Jan. 10, 2006
Filed:
May. 17, 2005
Etsuko Nomoto, Sagamihara, JP;
Kouji Nakahara, Kunitachi, JP;
Shinji Tsuji, Hidaka, JP;
Makoto Shimaoka, Ushiku, JP;
Etsuko Nomoto, Sagamihara, JP;
Kouji Nakahara, Kunitachi, JP;
Shinji Tsuji, Hidaka, JP;
Makoto Shimaoka, Ushiku, JP;
Opnext Japan, Inc., Kanagawa, JP;
Abstract
The present invention provides a highly reliable ridge-waveguide semiconductor laser diode and an optical module. The p-side electrode of the ridge-waveguide laser diode has a first conductor layer region and a second conductor layer region formed on the first conductor layer region. At least one of facets of the second conductor layer region is recessed inward from a reflection facet. Thus, the ridge-waveguide semiconductor laser diode has a structure in which strain which is caused by the electrode stress to be applied on the diode facet is reduced and the saturable absorption does not occur. The ridge-waveguide semiconductor laser diode thus obtained is highly reliable, and the optical module using the same is remarkably high in reliability.