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Optics Communications

Secure optical communication using stimulated Brillouin scattering in optical fiber

Lilin Yi, Tao Zhang, Zhengxuan Li, Junhe Zhou, Yi Dong, Weisheng Hu

Published Nov 2, 2012• 18 citations
Publisher
DOI
10.1016/j.optcom.2012.10.017

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We propose to all-optically encrypt and decrypt high-speed optical signals using the stimulated Brillouin scattering (SBS) effect in optical fiber for the first time. The spectral-shaped SBS gain or loss distorts the broadband optical signal so as to realize optical encryption. A corresponding SBS loss or gain with the same spectral shape and amplitude recovers the distorted signal to implement optical decryption. We experimentally demonstrate the SBS encryption/decryption process on 10.86 Gb s −1 non-return-to-zero-on-off-keying (NRZ-OOK) data using phase-modulated Brillouin pumps to generate a spectral-shaped SBS gain/loss encryption key, and no power penalty is observed for the best decryption case. The proposed all-optical encryption/decryption method is completely compatible with existing fiber-optic communication systems.