Abstract Brillouin optical correlation-domain reflectometry (BOCDR) is one of the fiber-optic Brillouin-based distributed sensing techniques for strain and temperature with single-end accessibility. Since the first proposal of the basic concept in 2008, the performance of BOCDR has been drastically improved from a variety of aspects including high-speed operation. Here, we focus on one of the high-speed BOCDR configurations referred to as slope-assisted (SA-) BOCDR. In this configuration, instead of observing the whole Brillouin gain spectrum, only the spectral power at a certain frequency on the spectrum is detected, leading to frequency-sweep-free high-speed operation and some unique features. In this review paper, we describe the recent advances of SA-BOCDR technology from its principle to characterization and applications. We also discuss the current issues of SA-BOCDR and present a concluding remark. © 2020 Elsevier Science. All rights reserved.

中文翻译：

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斜率辅助布里渊光学相关域反射法研究进展

摘要 布里渊光学相关域反射计（BOCDR）是一种基于光纤布里渊的分布式应变和温度传感技术，具有单端可达性。自 2008 年首次提出基本概念以来，BOCDR 的性能从包括高速运行在内的多个方面得到了大幅提升。在这里，我们关注一种称为斜率辅助 (SA-) BOCDR 的高速 BOCDR 配置。在这种配置中，不是观察整个布里渊增益谱，而是仅检测频谱上某个频率处的频谱功率，从而实现无扫频高速运行和一些独特的功能。在这篇综述论文中，我们描述了 SA-BOCDR 技术从原理到表征和应用的最新进展。我们还讨论了 SA-BOCDR 的当前问题并提出了结束语。© 2020 爱思唯尔科学。版权所有。