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. 28, 2001
Filed:
Apr. 19, 1999
Hideyuki Nasu, Hiratsuka, JP;
Hideyuki Omura, Chigasaki, JP;
Kazuo Kogure, Urawa, JP;
Tomoyuki Kato, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The optical output of an optical device branched by means of an optical coupler is partially fetched by means of a wavelength stabilizer that includes an FBG section, whereby the passing wavelength characteristic of a fiber grating, which is believed originally to depend little on temperature, can be prevented from further changing. The wavelength of the optical device is tuned by means of a light wavelength tuning device that includes the wavelength stabilizer. Thus, the tuned wavelength is less liable to suffer an error that is attributable to the change of environmental temperature, so that the temperature dependence of the wavelength tuning operation is lowered.