Masoudi Ali, Newson Trevor P
Opt Lett. 2017 Jan 15;42(2):290-293. doi: 10.1364/OL.42.000290.
A distributed optical fiber dynamic strain sensor with high spatial and frequency resolution is demonstrated. The sensor, which uses the ϕ-OTDR interrogation technique, exhibited a higher sensitivity thanks to an improved optical arrangement and a new signal processing procedure. The proposed sensing system is capable of fully quantifying multiple dynamic perturbations along a 5 km long sensing fiber with a frequency and spatial resolution of 5 Hz and 50 cm, respectively. The strain resolution of the sensor was measured to be 40 nε.
展示了一种具有高空间和频率分辨率的分布式光纤动态应变传感器。该传感器采用ϕ-OTDR询问技术，由于改进的光学布置和新的信号处理程序，表现出更高的灵敏度。所提出的传感系统能够分别以5 Hz的频率分辨率和50 cm的空间分辨率，对长达5 km的传感光纤上的多个动态扰动进行全面量化。测得该传感器的应变分辨率为40 nε。
