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:
Sep. 25, 2007
Filed:
Nov. 16, 2001
Morten Nissov, Ocean, NJ (US);
Alexei A. Pilipetskii, Colts Neck, NJ (US);
Ekaterina Golovchenko, Colts Neck, NJ (US);
Jonathan Nagel, Brooklyn, NY (US);
Sergey Ten, Horsehead, NY (US);
Morten Nissov, Ocean, NJ (US);
Alexei A. Pilipetskii, Colts Neck, NJ (US);
Ekaterina Golovchenko, Colts Neck, NJ (US);
Jonathan Nagel, Brooklyn, NY (US);
Sergey Ten, Horsehead, NY (US);
Tyco Telecommunications (US) Inc., Morristown, NJ (US);
Abstract
A system, amplifier and method are provided for amplifying an optical signal in an optical communications system where spans between amplifiers may vary. The system includes a Raman amplifier variable gain portion and an EDFA gain portion. The amount of Raman amplifier gain is chosen to trade off accumulation of noise with accumulation of multi-path interference. This variable Raman gain is used to equalize the loss of each span so that the amount of optical power supplied at the input of the EDFA gain portion is substantially constant throughout the system.