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:
May. 27, 2008
Filed:
Nov. 18, 2003
Hiroshi Nakamoto, Kawasaki, JP;
Takao Naito, Kawasaki, JP;
Kenichi Torii, Kawasaki, JP;
Toshiki Tanaka, Kawasaki, JP;
Hiroshi Nakamoto, Kawasaki, JP;
Takao Naito, Kawasaki, JP;
Kenichi Torii, Kawasaki, JP;
Toshiki Tanaka, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A plurality of pump light sources generate plural variations of pump light having different frequencies. A modulation circuit intensity-modulates the plural variations of pump light in the predetermined periods, respectively. A pump light pair whose frequency difference equals a Raman shift frequency are modulated such that they cannot simultaneously enters an emission state. A wavelength-multiplexer wavelength-multiplexes the plural variations of pump light modulated by the modulation circuit. A optical guide device guides the plural variations of pump light wavelength-multiplexed by the wavelength-multiplexer to an optical fiber.