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Soliton interaction penalty reduction by receiver filtering

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4 Author(s)
Bakhshi, B. ; Dept. of Optoelectron. & Electr. Meas., Chalmers Univ. of Technol., Goteborg, Sweden ; Andrekson, P.A. ; Karlsson, M. ; Bertilsson, K.

We present the first detailed numerical study of the impact of receiver low-pass filtering in soliton interaction-limited communication systems. We propagate 40-Gb/s pseudorandom bit sequences (PRBS's) of 2/sup 8/-1 solitons up to one soliton collision distance (z/sub c/) and optimize the filter bandwidth to minimize the interaction induced eye opening penalty. The distance at 0.5-dB penalty is increased over 40% through filtering. The penalty is essentially pulsewidth independent when considering distances normalized by z/sub c/. We also show that PRBS's of at least 2/sup 8/-1 solitons are required to accurately simulate random data.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 7 )