Abstract
The signal-to-noise ratio (SNR) is a crucial metric for the evaluation of a stimulated Brillouin scattering (SBS) based sensing system. We propose and experimentally demonstrate chaotic Brillouin optical correlation domain analysis (BOCDA) using the Simplex coding technique for frequency-domain data processing to enhance the SNR. The pulse depletion in the chaotic coded-BOCDA is theoretically and experimentally analyzed, where the impact of cascaded SBS can be eliminated and then the anti-distortion capability is significantly improved. Compared to the single-pulse scheme, the signal-to-background noise ratio of the Brillouin gain spectrum is improved by 2.35 dB, and the data acquisition processing efficiency is improved by four times with the 15-bit Simplex pulse coding technique.
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