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:
Dec. 30, 2008
Filed:
Jul. 09, 2004
Thomas R. Clark, Jr., Columbia, MD (US);
Antonios A. Seas, Ellicott City, MD (US);
Michael L. Dennis, Ellicott City, MD (US);
Roger Dorsinville, Teaneck, NJ (US);
William Shieh, Clarksville, MD (US);
Thomas R. Clark, Jr., Columbia, MD (US);
Antonios A. Seas, Ellicott City, MD (US);
Michael L. Dennis, Ellicott City, MD (US);
Roger Dorsinville, Teaneck, NJ (US);
William Shieh, Clarksville, MD (US);
Broadwing Corporation, Austin, TX (US);
Abstract
A device and method for reducing amplified Rayleigh backscatter at a Raman pump. A pump assembly for an optical amplifier includes a set of pump radiation sources for Raman pumping an optical transmission span. Each pump radiation source is adapted to produce radiation having a pump wavelength and a pump power. The optical transmission span is adapted to provide Raman amplification of an optical data signal when pumped by the set of pump radiation sources. At least one optical isolator is selectively located between at least one selected pump radiation source and the optical transmission span to reduce amplified Rayleigh backscatter at the pump wavelength of the selected pump radiation source from feeding back into the selected at least one pump radiation source.