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Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs

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4 Author(s)
Kit Chan ; Dept. of Inf. Eng., Chinese Univ. of Hong Kong, China ; Chun-Kit Chan ; Lian Kuan Chen ; F. Tong

We propose and demonstrate an all-optical XOR gate at 20 Gb/s using four-wave mixing in a semiconductor optical amplifier (SOA), with return-to-zero differential phase-shifted keying modulated input signals. With such constant intensity modulation format, the patterning-induced degradation in SOA is also alleviated. The proposed scheme is robust and feasible for optical logic operation at ultrahigh speeds.

Published in:

IEEE Photonics Technology Letters  (Volume:16 ,  Issue: 3 )