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LPFG和FBG级联结构双参数光纤传感器研究
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作者单位:

1．北京信息科技大学 光电信息与仪器北京市工程研究中心北京100016;2.现代测控技术教育部重点实验室北京100192;3.北京信息科技大学 光电测试技术北京市重点实验室北京100192

中图分类号:

TH73

基金项目:

教育部“长江学者和创新团队”发展计划（IRT16R07）、北京市教委2015年度创新能力提升计划项目（TJSHG201510772016）、光电信息与仪器北京市工程研究中心开放课题（GD2016008）项目资助


Study on dualparameter fiber sensor based on LPFG cascaded with FBG structure
Author:
  • Zhang Wen

    Zhang Wen

    1.Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University,Beijing 100016,China；2. Key Laboratory of Modern Measurement Control Technology，Ministry of Education,Beijing 100192,China； 3. Beijing Key Laboratory of Optoelectronic Test Technology, Beijing Information Science and TechnologyUniversity,Beijing 100192,China
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  • Liu Xiaolong

    Liu Xiaolong

    1.Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University,Beijing 100016,China；2. Key Laboratory of Modern Measurement Control Technology，Ministry of Education,Beijing 100192,China； 3. Beijing Key Laboratory of Optoelectronic Test Technology, Beijing Information Science and TechnologyUniversity,Beijing 100192,China
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  • He Wei

    He Wei

    1.Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University,Beijing 100016,China；2. Key Laboratory of Modern Measurement Control Technology，Ministry of Education,Beijing 100192,China； 3. Beijing Key Laboratory of Optoelectronic Test Technology, Beijing Information Science and TechnologyUniversity,Beijing 100192,China
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  • Zhu Lianqing

    Zhu Lianqing

    1.Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University,Beijing 100016,China；2. Key Laboratory of Modern Measurement Control Technology，Ministry of Education,Beijing 100192,China； 3. Beijing Key Laboratory of Optoelectronic Test Technology, Beijing Information Science and TechnologyUniversity,Beijing 100192,China
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Affiliation:

1.Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University,Beijing 100016,China;2. Key Laboratory of Modern Measurement Control Technology，Ministry of Education,Beijing 100192,China; 3. Beijing Key Laboratory of Optoelectronic Test Technology, Beijing Information Science and TechnologyUniversity,Beijing 100192,China

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    摘要:

    提出了一种长周期光纤光栅（LPFG）级联布拉格光纤光栅（FBG）的温度/应变双参数光纤传感器。利用飞秒激光直写制作LPFG并级连FBG，且FBG波谷位置为1 551.9 nm，LPFG波谷位置为1 559.1 nm，最高对比度为-12.7 dB。在30~70℃温度变化范围内对传感器温度特性进行测试，并在25℃超净环境下对0~500 με应变变化范围内对传感器应变特性进行测试。实验结果表明，升温过程FBG中心波长发生红移，灵敏度15.00 pm/℃，线性度0.981 3；LPFG中心波长发生蓝移，灵敏度-11.75 pm/℃，线性度0.945 3。降温过程FBG中心波长发生蓝移，灵敏度18.25 pm/℃，线性度0.953 8；LPFG中心波长发生红移，灵敏度-15.42 pm/℃，线性度0.980 2。加载过程FBG中心波长发生红移，灵敏度0.93 pm/με，线性度0.991 5；LPFG中心波长发生蓝移，灵敏度-1.51 pm/με，线性度0.986 3。卸载过程FBG中心波长发生蓝移，灵敏度0.92 pm/με，线性度0.990 9；LPFG中心波长发生红移，灵敏度-1.51 pm/με，线性度0.972 8。结果表明，该光纤传感器灵敏度高，线性度好，可以同时动态实现应变和温度的测量。

    Abstract:

    A dual parameter fiber sensor based on Long Period Fiber Grating (LPFG) cascaded with Fiber Bragg Grating (FBG) structure for temperature and strain is presented. The proposed fiber sensor is cascaded with LPFG micromachined by the femtosecond laser and FBG, and there are two dips for the transmission spectrum, namely FBG transmission dip at 1 551.9 nm and LPFG transmission dip at 1 559.1 nm with the fringe contrast -12.7 dB. The temperature and strain characteristics of the proposed sensor were measured at 30~70℃ and 0~500 με, respectively. Experimental results show that during the warming process, the FBG shows red shift with increasing wavelength, the sensitivity is 15.00 pm/℃, and the linearity is 0.981 3; The LPFG shows blue shift with decreasing wavelength, the sensitivity is -11.75 pm/℃, and the linearity is 0.945 3. During the cooling process, the FBG shows blue shift with decreasing wavelength, the sensitivity is 18.25 pm/℃, and the linearity is 0.953 8; The LPFG shows red shift with decreasing wavelength, the sensitivity is -15.42 pm/℃, and the linearity is 0.980 2. During the loading process, the FBG shows red shift with increasing wavelength, the sensitivity is 0.93 pm/με, and the linearity is 0.991 5; The LPFG shows blue shift with decreasing wavelength, the sensitivity is -1.51 pm/με, and the linearity is 0.986 3. During the unloading process, the FBG shows blue shift with decreasing wavelength, the sensitivity is 0.92 pm/με, and the linearity is 0.990 9; The LPFG shows red shift with decreasing wavelength, the sensitivity is -1.51 pm/με, and the linearity is 0.972 8. The proposed sensor exhibits high sensitivity and good linearity for dualparameter measurements.

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张雯,刘小龙,何巍,祝连庆. LPFG和FBG级联结构双参数光纤传感器研究[J].仪器仪表学报,2017,38(8):2047-2054

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  • 在线发布日期: 2017-09-04
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