Strain sensor based on a pair of single-mode-multimode-single-mode fiber structures in a ratiometric power measurement scheme
Strain sensor based on a pair of single-mode-multimode-single-mode fiber structures in a ratiometric power measurement scheme
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DOI：
10.1364/ao.49.000536
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发表时间：
2010-01-20
期刊：
影响因子：
1.9
通讯作者：
Farrell, Gerald
中科院分区：
文献类型：
--
作者：
Hatta, Agus Muhamad;Semenova, Yuliya;Farrell, Gerald
对阶跃折射率单模-多模-单模（SMS）光纤结构的应变和温度依赖性进行了数值和实验研究。对于使用单个SMS光纤结构的基于强度的应变测量，在选定的波长下，发现存在高应变依赖性，但也存在将引起应变测量误差的温度依赖性。为了最大限度地减少温度引起的应变测量误差，提出了两种SMS光纤结构，并在比率功率测量方案中进行了演示;一种SMS结构作为应变传感器，另一种SMS结构作为温度监测器。所提取的温度信息用于基于应变响应随温度变化的适当校准来确定应变值。它表明，应变测量从0到1000 μ Ω的温度范围从10摄氏度到40摄氏度，建议的配置可以提供一个应变和温度分辨率为0.34 μ Ω和0.14摄氏度，分别与温度引起的应变测量误差低至0.39 μ Ω。(C)2010年美国光学学会
The strain and temperature dependencies of a step-index single-mode-multimode-single-mode (SMS) fiber structure are investigated numerically and experimentally. For intensity-based strain measurement using a single SMS fiber structure, at a selected wavelength, it is found that there is a high strain dependence, but also a temperature dependence that will induce strain measurement error. To minimize the temperature-induced strain measurement error, two SMS fiber structures are proposed and demonstrated in a ratiometric power measurement scheme; one SMS structure acts as the strain sensor, and the other SMS structure acts as the temperature monitor. The extracted temperature information is used to determine a strain value based on a suitable calibration of strain responses with temperature variations. It is demonstrated that for strain measurement from 0 to 1000 mu epsilon within the temperature range from 10 degrees C to 40 degrees C, the proposed configuration can provide a strain and temperature resolution of 0.34 mu epsilon and 0.14 degrees C, respectively, with a temperature-induced strain measurement error as low as 0.39 mu epsilon. (C) 2010 Optical Society of America