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:
Jul. 13, 2010
Filed:
Aug. 11, 2006
Takeshi Sakamoto, Kawasaki, JP;
Kosuke Komaki, Kawasaki, JP;
Yuji Shimada, Kawasaki, JP;
Takuji Maeda, Kawasaki, JP;
Takeshi Sakamoto, Kawasaki, JP;
Kosuke Komaki, Kawasaki, JP;
Yuji Shimada, Kawasaki, JP;
Takuji Maeda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
During initial start-up of an optical communication system, an ASE reference span loss is calculated based on transmitting power and received power of ASE light generated by an optical amplifier, and an OSC reference span loss is calculated based on the transmitting power and the received power of OSC light. During normal operation of the optical communication system, a span loss is calculated using the OSC light, and an amount of change in the span loss representing a difference between the span loss and the OSC reference span loss is calculated. A current span loss between a transmitting station and a receiving station is calculated by adding the amount of change in the span loss to the ASE reference span loss.