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:
Nov. 02, 2004
Filed:
Aug. 15, 2001
Tetsufumi Tsuzaki, Yokohama, JP;
Motoki Kakui, Yokohama, JP;
Shinji Ishikawa, Yokohama, JP;
Masashi Onishi, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
Disclosed are a gain module and an optical communication system which have gain in a broad wavelength range and are of low cost. The gain module has two optical fibers and which differ from each other with respect to the composition of their respective optical waveguide region and which are connected in series. Because they differ from each other with respect to the quantity of their respective Stokes shift, they have gain in a different wavelength, respectively. The signal lights are introduced into the input end , amplified with the gain module in a wide wavelength range where an optical fiber has a Raman amplification gain, and are emitted from the output end .