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. 29, 1994
Filed:
Aug. 28, 1992
Kenichi Yoneyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an optical fiber amplifier circuit comprising first through m-th excitation light sources generating first through m-th excitation lights, first through m-th driving circuits drive the first through the m-th excitation light sources, respectively. Each of first through m-th transducers are coupled to each of the first through the m-th excitation light sources and transduces a part of each of the first through the m-th excitation lights to first through m-th electrical signals. In response to the first through the m-th electrical signals, a control circuit supplies first through m-th control signals to the first through the m-th driving circuits to control the first through the m-th excitation light sources so that the first through the m-th excitation light sources generate the first through the m-th excitation lights having first through m-th output power ratios 1/A.sub.1 to 1/A.sub.m.