We present measurements of the Raman efficiency spectra for recent transmission fibres and model the improvement in DWDM system performance using distributed Raman amplification. For 5 spans of 25 dB fibre loss and 1 dB of connector loss, we predict 4.5-6.5 dB improvement in OSNR when using a 500 mW pump, a variation of up to 2 dB depending on fibre type.

© 2000 Optical Society of America

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