分布式光纤传感在海底电缆检测中的应用

Application of distributed optical sensor in submarine cable detection

分析了布里渊光时域反射(BOTDR)传感原理和基于光时域反射(OTDR)的定位原理。研究了一种适用于海底电缆系统复杂环境中温度和应变测量的新型光纤——碳密封涂覆光纤,分析了其耐腐蚀和抗疲劳等性能,并对海底光纤复合电缆中传感光纤的安装方式进行了探讨。这种新型光纤在海底电缆系统检测及其他方面将会有很大的应用前景。

This paper analyses the principle of the Brillouin back-scattering effect based on sensing and the positioning principle based on OTDR （Optical Time-Domain Reflectometry）. A new type of optical fiber named carbon hermetically coated optical fiber which is used in the temperature and strain measurement of the complex submarine system is discussed. Meanwhile, the anti-corrosion and anti-fatigue properties and other applications of carbon hermetically coated optical fibers are analysed, and the installation method for sensing optical fiber of submarine optical cable is also introduced in the paper.