Method and apparatus for providing a broadband raman amplifier with improved noise performance
A method and apparatus is presented which reduces noise degradation in the shorter wavelength band by using modulation of one/multiple pumps plus multiple-order Raman amplification. Such a scheme is very suitable for the case of SSMF fiber where pump-pump induced four-wave mixing (FWM) effects are negligible. Further, a group Time Domain Multiplexing (TDM) configuration is provided to simultaneously reduce the amplified spontaneous emission (ASE) noise and pump-pump induced FWM effects for the case of NZ-DSF fiber.
AT&T Corp.
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inventional inventional additional
Martin Xiang
Birk Zhou