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Raman amplification has many attractive features. In case of WDM transmission through standard SMFs a dispersion compensation fiber (DCF) is effectively united with a Raman amplifier by launching pump light into the DCF. We propose a novel Raman amplifier with a reflective structure that has advantages such as high efficiency of pumping, easy combination with a tunable dispersion compensator, and easy protection against pump power leakage into the transmission line. Optical power budget of 6dB is obtained comparing to the case without amplification in an experiment where optical signals of 40-Gbit/s 8-channls WDM with a 0.8-nm spacing are transmitted over 60km.

40-Gbit/s WDM Transmission Incorporating with a Reflective Type Amplifier Using a Raman Active DCF