40-gbit/s×4-channel all-optical multichannel limiter utilizing spectrally filtered optical solitons

摘要

We propose a novel, all-optical, multi-channel limiter that uses spectrally filtered optical solitons. The periodic nonlinear optical fiber described herein can suppress the inter-channel interaction caused by four-wave mixing. By applying this all-optical multi-channel limiter to a 40 Gbit/s ×4 channel wavelength division multiplexing signal, minimum received optical powers at the bit-error-rate of 10{sup}-9 were improved by more than 2 dB in all channels.