19Distributed Sensing Based on Brillouin Optical Correlation‐Domain Analysis
Brillouin scattering‐based distributed optical fiber sensors have been extensively studied for decades because of their capabilities to provide continuous temperature or strain information along the whole fiber, which have been widely used in many applications including oil or gas pipeline security protection, civil structural health monitoring, and chemical testing [1–4]. To date, Brillouin scattering‐based fiber sensors can be classified into three types in different domains: frequency [5], time [6–16], and correlation [17–36] systems. Among them, the most rapidly developed system is Brillouin optical time‐domain analysis or reflectometry (BOTDA/R), wherein pump ...
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