基于BOTDR系统的检测方法研究进展

Research progress for detection method based on BOTDR system

从BOTDR系统信号的检测方法出发,分别介绍了本地外差相干检测及自外差相干检测两种相干检测方法,描述并对比了多波长BOTDR系统的两种不同检测方法,进而列举分析了BOTDR检测系统中的噪声因素,对利用相干检测方法提升BOTDR系统信噪比的研究现状进行了研究。

According to the detection methods of signal of BOTDR system, this paper introduced the local het- erodyne coherent detection and the self-heterodyne detection respectively, as well as two detection methods of detecting multiple wavelength BOTDR system were introduced and compared respectively. Then the noise factors of BOTDR detection system were analyzed, in the end of this paper, it introduced the research progress of enhancing SNR（Signal to Noise Ratio, SNR） by using the coherent detection BOTDR system.