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. 13, 2016
Filed:
Jul. 02, 2015
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Katsumi Uesaka, Yokohama, JP;
Eiichi Banno, Yokohama, JP;
Hajime Shoji, Yokohama, JP;
Hiroyuki Matsuura, Tsukuba, JP;
Haruhiko Kuwatsuka, Tsukuba, JP;
Ken Tanizawa, Tsukuba, JP;
Shu Namiki, Tsukuba, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Abstract
A laser apparatus for tuning the emission wavelength of a wavelength tunable laser diode will be described. The apparatus includes a tunable LD with heaters to tune the emission wavelength of the tunable LD, and a controller to control the power supplied to the heaters. A feature of the laser apparatus is that the controller supplies pre-emphasis power to the heaters before the supplement of the power corresponding to the re-tuned emission wavelength to accelerate the stability of the temperature of the heaters.