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:
Nov. 27, 2007
Filed:
Oct. 19, 2004
Takuma Shouji, Kawasaki, JP;
Eiji Iida, Kawasaki, JP;
Miwa Taniguchi, Kawasaki, JP;
Tomoyuki Kanzaki, Kawasaki, JP;
Kazuaki Nagamine, Kawasaki, JP;
Toshihiro Suzuki, Kawasaki, JP;
Shingo Hara, Kawasaki, JP;
Takuma Shouji, Kawasaki, JP;
Eiji Iida, Kawasaki, JP;
Miwa Taniguchi, Kawasaki, JP;
Tomoyuki Kanzaki, Kawasaki, JP;
Kazuaki Nagamine, Kawasaki, JP;
Toshihiro Suzuki, Kawasaki, JP;
Shingo Hara, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
When a tunable laser is operating at any one of the different wavelengths, wavelength data is sampled and stored in a memory device. In the case where the same operating wavelength as a wavelength hitherto operated needs to be reset to the tunable laser, the wavelength data stored in the memory device is set to the tunable laser. This makes it possible to avoid a shift in wavelength due to age degradation of the tunable laser that selectively outputs any one of light signals of different wavelengths in dependence on the wavelength data set to the tunable laser.