Duck G, Ohn M M
Opt Lett. 2000 Jan 15;25(2):90-2. doi: 10.1364/ol.25.000090.
A new method of distributed in-fiber Bragg grating sensing is proposed. A method is outlined by which the strain field imposed upon a Bragg grating sensor is obtained by measurement of the sensor's reflectivity and delay characteristics. The proposal is demonstrated by interrogation of two loaded samples. Strain distributions from these experiments are compared against a theoretical estimate. The data treatment is also discussed. Strain resolution is found to be +/-24 microepsilon, with a spatial resolution defined by a minimum spatial wavelength component of the coupling distribution of 1.65 mm.
提出了一种分布式光纤布拉格光栅传感的新方法。概述了一种通过测量布拉格光栅传感器的反射率和延迟特性来获取施加在该传感器上的应变场的方法。通过对两个加载样本进行询问来验证该提议。将这些实验得到的应变分布与理论估计值进行了比较。还讨论了数据处理。发现应变分辨率为±24微应变，空间分辨率由耦合分布的最小空间波长分量定义为1.65毫米。
