光学学报, 2015, 35 (10): 1006005, 网络出版: 2015-10-08
基于复合波长参考的温度稳定光纤光栅传感解调研究
Research of Temperature-Stable Fiber Bragg Grating Sensing Demodulation Based on Composite Wavelength References
光纤光学 光纤传感 光纤光栅 波长参考 气体吸收谱 标准具 fiber optics fiber sensing fiber Bragg grating wavelength reference gas absorption spectrum etalon
摘要
为实现温度稳定的光纤光栅传感解调,提出了综合使用法布里-珀罗(F-P)标准具和乙炔气室进行实时复合波长参考的校正方法。分析了F-P标准具透射光谱和乙炔气室吸收光谱的温度漂移特性。建立实验系统,测试了F-P标准具透射光谱的温度漂移特性,实验显示F-P标准具谱线平均温度灵敏度为1.16 pm/℃,谱线温度重复性误差可达13.0 pm。进行了基于F-P标准具单独参考和基于复合波长参考的解调温度稳定性实验,实验结果表明0 ℃~55 ℃的高低温循环,基于F-P标准具单独参考的解调值变化范围为±32.7 pm,标准差为20.7 pm,基于复合波长参考的解调值变化范围为±1.2 pm,标准差为0.39 pm,解调值变化范围温度稳定性提高了27倍。
Abstract
In order to realize temperature-stable fiber Bragg grating (FBG) sensing demodulation, a calibration method of real-time composite wavelength references using Fabry-Pérot (F-P) etalon and acetylene gas cell is proposed. The temperature drift properties of F-P etalon transmitted spectrum and acetylene gas cell absorption spectrum are analyzed. The experiment system is developed to test temperature drift property of F- P etalon transmitted spectrum. The experiment shows that the average temperature sensitivity of F-P etalon spectral line is 1.16 pm/℃ and the temperature repeatability error can be up to 13.0 pm. Temperature stability of demodulation both using F-P etalon as wavelength reference and composite wavelength references is studied. The experimental results show that under temperature cycle from 0 ℃ to 55 ℃, the range of variation using single wavelength reference is ±32.7 pm, and the standard deviation is 20.7 pm. However, the range of variation using composite wavelength references can be ± 1.2 pm, and the standard deviation is 0.39 pm. The temperature stability of variation range increases 27 times.
江俊峰, 何盼, 刘铁根, 刘琨, 王双, 潘玉恒, 俞琳, 闫金玲. 基于复合波长参考的温度稳定光纤光栅传感解调研究[J]. 光学学报, 2015, 35(10): 1006005. Jiang Junfeng, He Pan, Liu Tiegen, Liu Kun, Wang Shuang, Pan Yuheng, Yu Lin, Yan Jinling. Research of Temperature-Stable Fiber Bragg Grating Sensing Demodulation Based on Composite Wavelength References[J]. Acta Optica Sinica, 2015, 35(10): 1006005.