Strain measurement by fiber-loop ring-down spectroscopy and fiber mode converter
Strain measurement by fiber-loop ring-down spectroscopy and fiber mode converter
复制标题
DOI：
10.1109/jsen.2008.926884
复制
发表时间：
2008-07-01
影响因子：
4.3
通讯作者：
Li, Gaoming
中科院分区：
文献类型：
--
作者：
Qiu, Huiye;Qiu, Yishen;Li, Gaoming
提出了一种结合光纤模式转换器的多模光纤环衰荡光谱应变测量方法。用多模光纤弯曲损耗理论解释了应变引起衰荡腔损耗的机理，与实验结果符合较好。利用该技术，通过测量衰荡时间在时域中实现应变测量。该应变传感系统具有良好的线性响应、良好的稳定性和高分辨率，在800 μ m范围内的分辨率可达0.33 μ m。
A multimode fiber-loop ring-down spectroscopy combined with a fiber mode converter for strain measurement is presented. The bending loss theory in multimode fibers is used for the explanation of strain induced ring down cavity loss mechanism, which agrees well with the experimental results. With this technique, strain measurement is achieved in a time domain by measuring the ring-down time. The strain sensing system is demonstrated with good linear response, good stability and high resolution as small as 0.33 mu epsilon over a rang of 800 mu epsilon.