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:
Oct. 24, 2000
Filed:
Nov. 13, 1998
Applicant:
Inventors:
Assignee:
Korea Institute of Science and Technology, Seoul, KR;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04J / ; H01S / ;
U.S. Cl.
CPC ...
385 37 ; 385 24 ; 385 42 ; 359115 ; 359130 ; 359341 ; 372-6 ;
Abstract
A method and apparatus for controlling gain of an optical fiber amplifier includes a plurality of optical isolators, an excitation light source, a wavelength division optical fiber coupler, and a special optical fiber. At least one of the optical isolators is disposed at both input and output ports of the optical fiber amplifier so that an input signal light can propagate in one direction. The wavelength division optical fiber coupler couples excitation light from the excitation light source to the input signal light or separates one of the excitation light and the input signal light from the other.