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. 16, 2004
Filed:
Jul. 25, 2001
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical transmission path in a Raman gain module ( ) for transmitting signal light input from an input terminal ( ) and Raman-amplifying the signal light by pumping light supplied from pumping light source units ( ) is formed by connecting in series two Raman amplification optical fibers ( ) having different wavelength dispersion values. According to this arrangement, wavelength dispersion in the amplifier module ( ) can be controlled using, e.g., the combination of the wavelength dispersion values of the Raman amplification optical fibers ( ). Hence, accumulation of dispersion into signal light and signal light transmission in an almost zero dispersion state are prevented, and degradation in signal light transmission quality due to the nonlinear optical effect is suppressed.