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. 04, 2003
Filed:
Jun. 27, 2001
Sadayuki Matsumoto, Tokyo, JP;
Takuya Ohira, Tokyo, JP;
Masakazu Takabayashi, Tokyo, JP;
Kiichi Yoshiara, Tokyo, JP;
Shigeru Matsuno, Tokyo, JP;
Hajime Takeya, Tokyo, JP;
Junichiro Hoshizaki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A temperature control device for controlling temperature variable devices disposed near a grating of a variable dispersion equalizer including an optical waveguide having the grating. The temperature variable devices control temperatures independently of each other. The temperature control device includes a controller for controlling the temperature variable units, and a storage device which stores temperature control patterns including combinations of control signals for the respective temperature variable units. The controller controls the temperature variable devices with a control signal of at least one of the temperature control patterns selected from the storage device.