摘要
提出了一种飞秒刻写光纤法布里-珀罗(F-P)腔级联切趾布拉格光纤光栅(FBG)的微结构传感器并研究了该传感器的温度与应变传感特性。该微结构传感器光谱稳定性良好,监测时长2 h内FBG波长最大漂移量为0.009 nm,功率最大漂移量为0.015 d B,F-P腔波长最大漂移量为0.018 nm,功率最大漂移量为0.072 d B。当应变由0με增至450με再减回0με时,该微传感器FBG特征峰先右移再左移,波长变化0.530 4 nm,应变灵敏度约1.17 pm/με,线性度高于0.99;光纤F-P腔特征谷波长变化0.491 1 nm,应变灵敏度约1.10 pm/με,线性度高于0.90。当温度由50℃升至200℃再降回50℃时,FBG特征峰先右移再左移,波长变化约1.418 nm,应变灵敏度约10.09 pm/℃,线性度高于0.95;光纤F-P腔特征谷波长变化约1.578 nm,应变灵敏度约10.53 pm/℃,线性度高于0.98。所提出的微结构传感器是解决单根光纤双参数测量的有效手段,同时对复杂环境下的多参数耦合测量与解耦也具有重要的参考价值。
A cascaded fiber Fabry-Perot （F-P） cavity fabricated by femtosecond laser with fiber Bragg grating （FBG） and its sensing characterization has been proposed and its temperature and strain sensing characterization has been studied. During two hours of stability test, the maximum FBG wavelength shift is 0. 009 nm, and the maximum FBG power drift is 0. 015 dB; the maximum F-P cavity wavelength shift is 0. 018 nm, and the maximum F-P cavity power drift is 0. 072 dB. When the strain is varying from 0με to 450 με then back to 0 με, the FBG wavelength peak is shifting towards right then left with the wavelength shift 0. 530 4 nm, and the strain sensitivity is 1.17 prn/ixa with linearity higher than O. 99; the F-P cavity wavelength shift 0. 4911nm, and the strain sensitivity is 1.10 pm/Ix~ with linearity higher than O. 90. When the temperature is varying from 50℃ to 200℃ then back to 50℃, the FBG wavelength peak is shifting towards right then left with the wavelength shift 1. 418nm, and the temperature sensitivity is 10.09 pm/℃ with linearity higher than 0.95; the F-P cavity wavelength shift 1. 578 nm, and the strain sensitivity is 10.53 pm/℃ with linearity higher than O. 98. This paper provides not only effective method to solve the problem of single fiber for double parameter but also reference value for the measurement of multi parameters coupling and decoupling in complex environment.
作者
张雯
孟凡勇
宋言明
娄小平
祝连庆
Zhang Wen Meng Fanyong Song Yanming Lou Xiaoping Zhu Lianqing(Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University, Be~iing 100016, China Key Laboratory of Modern Measurement Control Technology, Ministry of Education, Be~iing 100192, China Be~iing Key Laboratory of Optoelectronic Test Technology, Beifing Information Science and Technology University, Belting 100192, China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2017年第9期2193-2199,共7页
Chinese Journal of Scientific Instrument
基金
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(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
关键词
飞秒加工
光纤F-P腔
稳定性
应变特性
温度特性
femtosecond laser micromachining
fiber Fabry-Perot cavity
stability
strain characterization
temperature characterization
