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:
Aug. 30, 2005
Filed:
Mar. 05, 2002
Kimio Tatsuno, Tokyo, JP;
Katsumi Kuroguchi, Yokohama, JP;
Atsuhiro Yamamoto, Yokohama, JP;
Teruhisa Azumaguchi, Yokohama, JP;
Hiroaki Furuichi, Yokohama, JP;
Kimio Tatsuno, Tokyo, JP;
Katsumi Kuroguchi, Yokohama, JP;
Atsuhiro Yamamoto, Yokohama, JP;
Teruhisa Azumaguchi, Yokohama, JP;
Hiroaki Furuichi, Yokohama, JP;
Opnext Japan, Inc., Kanagawa, JP;
Abstract
A subject of the invention is to reduce the temperature dependence of an etalon as a wavelength locker for a semiconductor laser device and so forth. Concretely, it is to restrict the lowering of the wavelength locking performance of the etalon dependent on the temperature variation. A means to solve the subject is the use of an air gap etalon. Concretely, the means is provided with a media plate and parallel plane plates on both sides of the media plate. The two parallel plane plates and the space between them constitute the air gap etalon.