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Optical Engineering

All-optical encryption/decryption for nonreturn-to-zero differential phase-shift keying signals using four-wave mixing in semiconductor optical amplifier
Author(s): Xuelin Yang; Peng Zhou; Xiaonan Hu; Weisheng Hu
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Paper Abstract

By experiment we demonstrate an all-optical encryption/decryption scheme for nonreturn-to-zero differential phase-shift keying (NRZ-DPSK) signals at 10  Gbit/s using all-optical exclusive-OR (XOR) logic. The key bit stream is performed by a pseudorandom bit stream. The all-optical XOR logic is achieved by nondegenerate four-wave mixing (FWM) in a semiconductor optical amplifier (SOA), which allows high data rate operation and asymmetric optical powers of the two input bit streams. The gain dynamics and pattern effect associated with the SOA carrier lifetime are alleviated due to the constant envelope of the NRZ-DPSK signals.

Paper Details

Date Published: 24 April 2015
PDF: 5 pages
Opt. Eng. 54(4) 046108 doi: 10.1117/1.OE.54.4.046108
Published in: Optical Engineering Volume 54, Issue 4
Show Author Affiliations
Xuelin Yang, Shanghai Jiao Tong Univ. (China)
Peng Zhou, Shanghai Jiao Tong Univ. (China)
Xiaonan Hu, Shanghai Jiao Tong Univ. (China)
Weisheng Hu, Shanghai Jiao Tong Univ. (China)

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