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:
Jul. 22, 2003
Filed:
Jul. 03, 2002
Fujikura Ltd., Tokyo, JP;
Abstract
An optical fiber amplifier having improved gain and reduced noise, and an optical amplifier which restrains an unnecessary polarization component in the signal output light, maintains polarization of a signal light and performs optical amplification in which a polarizer is connected between a first optical fiber and a second optical fiber. An amplified spontaneous emission is emitted from the output end of the first fiber with the amplified signal light and is incident to the polarizer. The polarizer is disposed so as to transmit a polarization component which is parallel with the signal light. Among the different light components which are incident to the polarizer, a light having a polarization component which is orthogonal with the signal light is rejected.