All-optical signal encoder-decoder for secure communications

W. Randall Babbitt; Akash Mohan; James A. Ritcey

doi:10.1117/12.300906

1 February 1998 All-optical signal encoder-decoder for secure communications

W. Randall Babbitt, Akash Mohan, James A. Ritcey

Proceedings Volume 3228, Multimedia Networks: Security, Displays, Terminals, and Gateways; (1998) https://doi.org/10.1117/12.300906
Event: Voice, Video, and Data Communications, 1997, Dallas, TX, United States

Abstract

Direct sequence spread spectrum (DS/SS) is often employed for non-centralized multiple access, and an added degree of system security in coherent optical communications. With advances in coherent optical processing using Spatial- Spectral Holographic (SSH) Devices, it is possible to implement an all optical encoder/decoder for M-ary phase shift keying DS/SS. We address the issue of code selection of length N code sequences drawn from an alphabet consisting of M unit length phasers and designed for a multiuser environment. The codes are selected using very fast simulated re-annealing based on the criterion of minimizing the periodic auto and cross correlation sidelobes. The all optical implementation is discussed.

Citation Download Citation

W. Randall Babbitt, Akash Mohan, and James A. Ritcey "All-optical signal encoder-decoder for secure communications", Proc. SPIE 3228, Multimedia Networks: Security, Displays, Terminals, and Gateways, (1 February 1998); https://doi.org/10.1117/12.300906

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