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. 09, 2003
Filed:
Dec. 26, 2001
Haruo Nakaji, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to an optical amplifier and the like comprising a structure for effectively suppressing transient output signal power fluctuations caused by delays in control. The optical amplifier including an amplification optical fiber comprises a control system ( ) for monitoring, through a light-receiving device, power fluctuations in part of light tapped by a branching device and regulating the power of pumping light outputted from a pumping light source. A delay medium is disposed between the branching device and the amplification optical fiber, so as to reduce the difference between the time required for signals transmitted through the branching device to reach the input end of the amplification optical fiber and the response time of the control system, thereby suppressing fluctuations in the output signal level.