Departamento Ingeniería Eléctrica y Electrónica-Universidad Pública de Navarra, Pamplona, Spain.
Opt Lett. 2011 Oct 15;36(20):4059-61. doi: 10.1364/OL.36.004059.
A 253 km ultralong remote displacement sensor system based on a fiber loop mirror interrogated by a commercial optical time-domain reflectometer is proposed and experimentally demonstrated. The use of a fiber loop mirror increases the signal-to-noise ratio, allowing the system to interrogate sensors placed 253 km away from the monitoring system without using any optical amplification. The displacement sensor was based on a long period grating spliced inside of the loop mirror, which modifies the mirror reflectivity accordingly to the applied displacement.
提出并实验验证了一种基于光纤环镜、由商用光时域反射计（OTDR）进行探测的 253km 超远距离遥测位移传感器系统。光纤环镜的使用提高了信噪比，使得系统无需任何光放大即可探测放置在距离监测系统 253km 远的传感器。位移传感器基于长周期光纤光栅（LPFG），将其熔接在环镜内部，根据所施加的位移改变镜反射率。
