Brillouin optical time-domain reflectometry (BOTDR) is a branch of distributed fibre-optic sensors, and it can measure the strain and the temperature information, localised by the return time of the probe pulse, along the fibre based on the spontaneous Brillouin scattering process. Parameters of the BOTDR system, including the spatial resolution, the signal-to-noise ratio, the measurement speed, and the sensing range, have a mutually restrictive relationship. In order to improve the performance of the BOTDR system, researchers have focussed on improving the design of the probe pulse, for example, transforming the shape, the sequence, and the spectral properties of the pulse. This study summarises the recent progress in the design of detection pulses in BOTDR systems, and comprehensively demonstrates the improvement effects of various pulse modulation formats on the system performance.

中文翻译：

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布里渊光时域反射计中的探测脉冲设计

布里渊光时域反射计（BOTDR）是分布式光纤传感器的一个分支，它可以基于自发布里渊散射过程测量沿光纤的应变和温度信息，这些信息由探测脉冲的返回时间定位. BOTDR系统的参数，包括空间分辨率、信噪比、测量速度和传感范围，具有相互制约的关系。为了提高BOTDR系统的性能，研究人员着重改进了探测脉冲的设计，例如改变脉冲的形状、序列和光谱特性。本研究总结了 BOTDR 系统中检测脉冲设计的最新进展，