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Bit-error rate for a lightwave communication system incorporating an erbium-doped fibre amplifier

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2 Author(s)
Li, T. ; Dept. of Electr. Eng., Columbia Univ., New York, NY, USA ; Teich, M.C.

The photon-number distribution at the output of an erbium-doped fibre amplifier (EDFA) with coherent light at the input is shown to obey the noncentral-negative-binomial (NNB) distribution. The use of this distribution in a binary on/off keying system gives rise to a lower bit-error rate (BER) than the Gaussian distribution, because the tails of these distributions differ (even for large mean input photon numbers).

Published in:

Electronics Letters  (Volume:27 ,  Issue: 7 )