光时域反射计
反射计
光学
波分复用
波长
光纤布拉格光栅
多路复用
相(物质)
光纤
材料科学
物理
时域
光纤传感器
计算机科学
保偏光纤
电信
量子力学
计算机视觉
作者
Rui Hong,Yu Yan,Ruifeng Tian,Feng Wang,Yixin Zhang,X P Zhang
摘要
Phase sensitive optical time-domain reflectometry (Φ-OTDR) based on ultra-weak fiber Bragg grating (UWFBG) array measures the dynamic strain by extracting the phase of the reflective signals. However, the performance is challenged by the trade-off between spatial resolution and sensing distance. In this paper, we propose a wavelength division multiplexed (WDM) Φ-OTDR based on a cross-arranged dual-wavelength UWFBG array to overcome this limitation. By combining the vibration positioning results of two wavelengths, high resolution and long sensing distance can be achieved at the same time.
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