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:
Aug. 03, 2010
Filed:
Aug. 30, 2004
Toshiyuki Tokura, Tokyo, JP;
Katsuhiro Shimizu, Tokyo, JP;
Tasuku Fujieda, Tokyo, JP;
Ken'ichi Asakawa, Tokyo, JP;
Hitoshi Mikada, Tokyo, JP;
Katsuyoshi Kawaguchi, Tokyo, JP;
Toshiyuki Tokura, Tokyo, JP;
Katsuhiro Shimizu, Tokyo, JP;
Tasuku Fujieda, Tokyo, JP;
Ken'ichi Asakawa, Tokyo, JP;
Hitoshi Mikada, Tokyo, JP;
Katsuyoshi Kawaguchi, Tokyo, JP;
Abstract
A Raman amplifier includes a pumping light source, an optical coupler, and a Raman amplifier medium. The pumping light source outputs a pumping light that is intensity-modulated with a frequency equal to or higher than 100 megahertz. The optical coupler couples the pumping light with a carrier light. The Raman amplification medium is pumped by the pumping light to amplify the carrier light. The Raman amplification medium has characteristics of a low dispersion and a small difference between propagation times of the carrier light and the pumping light.