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基于渐变折射率多模光纤的光纤法珀应变传感器
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Fiber-optic Fabry?Perot strain sensor based on graded-index multimode fiber

摘    要
采用折射率分布平坦、高纤芯折射率的渐变折射率多模光纤,基于化学腐蚀和熔接方法,制作了微型非本征光纤法珀干涉应变传感器。与采用纤芯直径和纤芯折射率均较小的掺铒或掺硼光纤制作的传感器相比,反射光谱的最大值提高了12dB以上,有利于进一步提高传感器反射光谱对比度。实验中我们获得了22dB的高对比度,研究了此传感器的应变和温度特性。实验获得了良好的线性度和较高的灵敏度,传感器的应变和温度灵敏度分别为7.82pm/με和5.01pm/°C。
标    签 光纤传感器   渐变折射率多模光纤   光纤法珀干涉仪   化学腐蚀   060.2370   120.2230  
 
Abstract
By using a graded-index multimode fiber (GI-MMF) with a relatively flat index profile and high refractive index of the fiber core, a microextrinsic fiber-optic Fabry?P′erot interferometric (MEFPI) strain sensor is fabricated through chemical etching and fusion splicing. Higher reflectance of the microcavity is obtained due to the less-curved inner wall in the center of the fiber core after etching and higher index contrast between the GI-MMF core and air. The maximum reflection of the sensor is enhanced 12 dB than that obtained by etching of the Er- or B-doped fibers. High fringe contrast of 22 dB is obtained. The strain and temperature responses of the MEFPI sensors are investigated in this experiment. Good linearity and high sensitivity are achieved, with wavelength-strain and wavelength-temperature sensitivities of 7.82 pm/\mu \varepsilon and 5.01 pm/?C, respectively.

中图分类号

 
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所属栏目 Fiber Optics and Optical Communications

基金项目

收稿日期 2010/10/13

修改稿日期 2011/1/14

网络出版日期

作者单位点击查看


备注This work was supported by the State Key Laboratory of Advanced Optical Communication Systems and Networks, China.

引用该论文: Tian Zhao,Yuan Gong,Yunjiang Rao,Yu Wu,Zengling Ran,Huijuan Wu. Fiber-optic Fabry?Perot strain sensor based on graded-index multimode fiber[J]. 中国光学快报, 2011, 9(5): 050602


被引情况:


【1】, "Temperature-insensitive Mach-Zehnder interferometric strain sensor based on concatenating two waist-enlarged fiber tapers",Chinese Optics Letters 10, 70603-70606(2012)

【2】Yuncai Feng,Youwen Liu, "Surface waves at the interface of superconductor media and nonlinear metamaterials",Chinese Optics Letters 13, 12401-312405(2015)

【3】, "Refractive index sensor based on a step index multimode polymer optical f iber with a micro-hole created by a miniature numerical control machine",Chinese Optics Letters 11, 20601-20603(2013)

【4】, "High-temperature sensor using a Fabry-Perot interferometer based on solid-core photonic crystal fiber",Chinese Optics Letters 10, 70607-70609(2012)

【5】, "Multichannel fiber optic Fabry-Perot nonscanning correlation demodulator",Chinese Optics Letters 11, 70601-70603(2013)

【6】, "Temperature-independent refractive index measurement based on Fabry–Perot fiber tip sensor modulated by Fresnel reflection",Chinese Optics Letters 10, 50603-50606(2012)

【7】, "Liquid refractive index sensor based on polymer fiber with micro-holes created by femtosecond laser",Chinese Optics Letters 12, 90601-90604(2014)



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