Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kenneth C. Reichmann0
Patrick P. Iannone0
Xiang Zhou0
Date of Patent
March 11, 2008
0Patent Application Number
115435910
Date Filed
October 5, 2006
0Patent Primary Examiner
Patent abstract
A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. Multiple Raman pumps are multiplexed before coupling into the fiber. The Raman amplified optical signal may be demultiplexed and separately amplified by the SOAs before re-multiplexing. Gain profiles of the Raman pumps and the SOAs are selected to compensate for gain tilt and to alleviate the power penalty due to cross-gain modulation in the SOAs. The disclosed hybrid amplifier is especially useful in coarse wavelength division multiplexing (CWDM) systems.
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