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Optical Fiber Communication Conference

Demonstration of Hybrid Using ±π/2- and 0/π-Phase-Shifted SSFBG En/decoders in the 4×10Gbit/s OCDMA system

Bo Dai, Zhensen Gao, Xu Wang, Nobuyuki Kataoka, Naoya Wada

Published Jan 1, 2011• 0 citations
Publisher

Abstract

We develop the novel ±π/2-phase-shifted SSFBG en/decoders (31-chip 640Gchip/s) and verify the improved security performance. We also demonstrate the mixed use of 0/π- and ±π/2-phase-shifted SSFBG en/decoders in the 4-user 10Gbps/user OCDMA system.
DOI
10.1364/ofc.2011.owv6

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In this paper,0 / π-phase-shifted SSFBG( 0 / π-SSFBG) and the ± π /2-phase-shifter SSFBG( ± π/2-SSFBG) are used to encode the optical pulse signal. A comparison is made of the security performance of the 0 / π-SSFBG and the ± π /2-SSFBG. We evaluate the security performance by the investigation of the encoded waveforms of both encoders. The existence of dips in the waveform encoded by 0 / π-SSFBG allows eavesdroppers to extract code sequence straightforwardly. Nevertheless,the ± π /2 SSFBG based encoder improves the security by concealing the code information in the encoded waveform.