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:
Mar. 13, 2001
Filed:
Feb. 11, 1999
Mikinori Yamanaka, Sapporo, JP;
Yuji Tamura, Sapporo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The invention relates to an optical amplifier; more particularly, the invention provides an optical amplifier that contains a front-end optical amplifier and a back-end optical amplifier, and that is equipped with an automatic compensation function for automatically detecting and compensating for signal loss caused by a dispersion compensator inserted between the front-end and back-end optical amplifiers. The optical amplifier, which contains a front-end optical amplifier,and a back-end optical amplifier,comprises: a loss detection means,for detecting optical signal loss occurring between the front-end optical amplifier and the back-end optical amplifier; and a gain control means,for compensating, based on the loss detected by the loss detection means, for a variation in optical output power of the entire optical amplifier including the front-end optical amplifier and back-end optical amplifier.