光纤Bragg光栅阵列的光时域反射探测技术研究

Research on the detection of fiber Bragg grating array using optical time domain reflection technology

本文研究了采用光时域反射技术对串联光栅阵列的反射功率进行探测的新方法。在实验研究的基础上,对高反射率光栅在光时域反射测试系统中的“假峰”和“谐振峰”现象的产生根源进行了分析,并提出了适合于光时域反射测试系统的光栅反射率的具体要求。此外对光时域反射测试技术的空间分辨率、复用数量进行了分析,给出了综合考虑多种因素的光栅传感阵列的布置方案。光时域反射探测技术是一种新颖的光栅阵列测试技术,与传统的波长测试系统相比,可从时分复用角度大大增加复用数量。

A new detection method of fiber Bragg grating array using optical time domain reflection technology was investigated. Based on the experimental researches, the phenomena of ＂ dummy peak＂ and ＂ syntonic peak＂ were analyzed. The specific demand for the reflection ratio of fiber Bragg grating used in optical time domain reflection system was discussed. Moreover the spatial resolution and the number of multiplexing sensors were also studied, and the setup of fiber Bragg grating array was presented considering various factors. The optical time domain reflection technology is a novel detection method for fiber Bragg grating array, and compared with conventional wavelength detection system it increases the number of multiplexing sensors in terms of time division multiplexing.