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:
Dec. 08, 2009
Filed:
Mar. 20, 2006
Akira Yamamoto, Fukuoka, JP;
Haruki Tanaka, Fukuoka, JP;
Tatsuo Nagayoshi, Fukuoka, JP;
Tomoyuki Sakata, Fukuoka, JP;
Taro Asao, Kawasaki, JP;
Akira Yamamoto, Fukuoka, JP;
Haruki Tanaka, Fukuoka, JP;
Tatsuo Nagayoshi, Fukuoka, JP;
Tomoyuki Sakata, Fukuoka, JP;
Taro Asao, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention provides an optical add/drop multiplexer including an optical power control unit for performing a control of an optical power by the unit of each signal light included in the wavelength multiplexed light, wherein the optical power control unit includes control logic for implementing a first control mode in which a transition to an automatic control of the optical power and release from the aforementioned control are carried out by comparing the optical power with a threshold value, and a second control mode in which a transition to an automatic control of the optical power is carried out based on control information of a notification by another of the optical add/drop multiplexers and release from the automatic control is carried out based on the comparison between the optical power and the threshold value.