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:
May. 02, 2006
Filed:
Oct. 28, 2003
Sun-hyok Chang, Daejeon, KR;
Hee-sang Chung, Daejeon, KR;
Jin-soo Han, Daejeon, KR;
Seung-kwan Kim, Daejeon, KR;
Won-kyoung Lee, Busan, KR;
Moo-jung Chu, Daejeon, KR;
Sun-Hyok Chang, Daejeon, KR;
Hee-Sang Chung, Daejeon, KR;
Jin-Soo Han, Daejeon, KR;
Seung-Kwan Kim, Daejeon, KR;
Won-Kyoung Lee, Busan, KR;
Moo-Jung Chu, Daejeon, KR;
Abstract
A method for realizing, in a fiber amplifier with three stages of amplifiers, automatic gain control in which a constant gain is obtained when channels are varied, and automatic level control in which a constant output per channel is obtained when a light power is varied because of variations in span loss. A light power or another light power of a specific wavelength is monitored to determine when variations in these light powers take place, current values of pump laser diodes appropriate for an input is read from a lookup table, and pump laser diodes are driven. During this operation, a pump power of the first stage amplifier is constantly maintained, and those of the second or third stage amplifier are controlled.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile