Affiliation:
1. Taiyuan University of Technology
2. Shanxi-Zhejiang Institute of Advanced Materials and Chemical Engineering
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.
Funder
National Key Research and Development
Program of China
National Natural Science Foundation of
China
Basic Research Project of Shanxi
Province
Shanxi-Zheda Institute of Advanced
Materials and Chemical Engineering