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:
Sep. 25, 2001
Filed:
Jul. 21, 1998
Keisuke Asami, Tokyo, JP;
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
A semiconductor laser light source tunable in wavelength comprising: a semiconductor laser which has one facet having an antireflection coating; a tunable bandpass filter for transmitting a light having a specific wavelength from wavelength components of output light out of the one facet having the antireflection coating of the semiconductor laser; and a fiber grating member for receiving the transmitted light from the tunable band pass filter and for reflecting a light of the specific wavelength. Preferably, as the fiber grating member, a compound fiber bragg grating which comprises a plurality of fiber gratings connected in series, each of which receives transmitted light from the tunable band pass filter and reflects only an individual wavelength different from one another, is used.