布里渊光时域分析系统性能提高方法综述

Review of Methods for Improving Performance of Brillouin Optical Time-Domain Analysis System

布里渊光时域分析(BOTDA)系统的空间分辨率、传感距离、测量精度和测量时间等参数存在着相互制约的关系,如何改善BOTDA系统性能一直是分布式光纤传感领域的研究热点。系统传感距离及测量精度等指标均与系统信噪比密切相关,因此提高系统信噪比并兼顾空间分辨率对改善系统性能至关重要。综述了提高BOTDA系统性能的相关技术方法,这些技术在不同程度上延长了系统的传感距离、提高了系统的测量精度,使BOTDA系统能够更符合实际工程的需要。在分析了上述技术存在的问题后,对未来的研究进行了展望。

The spatial resolution, sensing distance, measurement accuracy and measurement time of the Brillouin optical time-domain analyzer （BOTDA） are interrelated to each other. How to improve the performance of the BOTDA system has been a hot topic in the field of distributed optical fiber sensing. Because the sensing distance and measurement accuracy of the BOTDA system are closely related to the signal-to-noise ratio （SNR）, the performance enhancement of the system focuses on the improvement of the SNR and the spatial resolution. The technical methods to improve the performance of the BOTDA system are reviewed. These technologies have extended the sensing distance and improved the measurement accuracy of the system, which make the BOTDA system more suitable for the practical engineering. After analyzing the existing problems, the future research directions are prospected as well.