Coherent OTDR for Measuring Distributed Temperature and Strain with High Resolution in km-long Fiber

摘要：

We researched a typical coherent optical time domain reflectometry system in which Rayleigh backscattering in a single-mode optical fiber was measured by coherent OTDR employing with a precisely frequency-controlled light source. The system can measure distributed temperature and strain with a resolution of 0.01 ℃ and a spatial resolution of 1 m in km-long fiber. Our simulation confirmed that the COTDR system enables us to measure distributed temperature and strain with high resolution. Backscattered power from the sensing fiber was measured and processed in simulation. This temperature resolution is two orders of magnitude better than that provided by the conventional BOTDR system.

关键词： Fiber sensor Rayleigh scattering temperature measurement strain measurement OTDR

作者: Yongqian Li Rongwei Li Zhi Yang

作者单位: Dept. of Electronic & Communication Engineering, North China Electric Power University, Baoding, 071003, China

会议类型: 国际会议

会议名称: 2010 International Conference on Intelligent Computation Technology and Automation(2010 智能计算技术与自动化国际会议 ICICTA 2010)

会议地点: 长沙

会议语种:英文

页码: 962-965

在线出版日期: 2010-05-11（万方平台首次上网日期，不代表论文的发表时间）