南京理工大学学报（自然科学版）2019，Vol.43Issue(2)：224-229,6.DOI:10.14177/j.cnki.32-1397n.2019.43.02.015
弱应变光纤光栅传感器匹配光栅解调方法
Study on matched grating demodulation of weak strain fiber grating sensor
王若聆 1李军 1莫宗来1
作者信息
- 1. 南京理工大学 机械工程学院,江苏 南京210094
- 折叠
摘要
Abstract
Based on the strain sensor of weak reflection fiber Bragg grating, the model of grating reflection spectrum is established,and the influence of grating length,period and arrangement order on the grating reflectivity is analyzed. It is found that the maximum reflectivity of grating increases with the increase of grating length and modulation depth,while the spectral width is greatly affected by the change of grating length:the smaller the grating length,the larger the spectral width. The peak reflectivity of the weak reflection grating array is related to the position of the grating. Being affected by multiple reflections,the lower the sensor grating,the smaller the peak reflectivity. By analyzing the reflection spectra in the demodulation process,the functional relationship between the strain of the sensor and the output light intensity is obtained.关键词
匹配光栅/弱应变/光纤光栅传感器/解调过程Key words
matched grating/weak strain/fiber grating sensors/demodulation process分类
信息技术与安全科学引用本文复制引用
王若聆,李军,莫宗来..弱应变光纤光栅传感器匹配光栅解调方法[J].南京理工大学学报（自然科学版）,2019,43(2):224-229,6.
