H - Electricity – 01 – S
Patent
H - Electricity
01
S
H01S 3/30 (2006.01) H04B 10/17 (2006.01)
Patent
CA 2369766
When varying the Raman gain or the gain tilt of an optical amplifier, there is no need to individually adjust the output level of every pump light source or perform overall adjustment, making it possible to obtain a targeted gain with little adjustment. For this purpose, in a pump light source for Raman amplification for outputting a plurality of pump lightwaves for effecting Raman amplification on signal lightwaves input to a light transmission path in the light transmission paths the pump light source for Raman amplification is divided into a shorter wavelength light source and a longer wavelength light source which differ in oscillation wavelength; a plurality of lightwaves emitted from the shorter wavelength light source and a lightwave emitted from the longer wavelength light source are coupled and output; and the plurality of lightwaves output from the shorter wavelength light source or the lightwave output from the longer wavelength light source is collectively controlled to adjust the intensity of the output light.
Emori Yoshihiro
Kado Soko
Robic
The Furukawa Electric Co. Ltd
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