激光与光电子学进展, 2019, 56 (17): 170630, 网络出版: 2019-09-05
非扫描相关解调光纤法布里-珀罗微腔应变传感器 下载: 982次
Non-Scanning Correlation Demodulation for Fiber-Optic Fabry-Perot Microcavity Strain Sensor
光纤光学 应变 光纤传感器 法布里-珀罗腔 非扫描相关解调 fiber optics strain fiber-optic sensor Fabry-Perot cavity non-scanning correlation demodulation
摘要
使用单模光纤与空芯熔石英光纤制作了一种高灵敏度的光纤法布里-珀罗(F-P)微腔应变传感器,并采用非扫描相关解调技术实现了这种应变传感器的解调。该传感器由两段垂直切割的单模熔石英光纤穿入一段空芯熔石英光纤制成,其腔长为微米量级。将单模熔石英光纤固定于空芯熔石英光纤两端,实现了光纤F-P微腔应变传感器腔长-应变灵敏度的增敏效果。根据其腔长变化范围采用非扫描相关解调技术进行解调,对于初始腔长为30.129 μm,空芯熔石英光纤长度为40 mm的光纤F-P微腔应变传感器,腔长-应变变化灵敏度达到了14.08 nm/με ,线性度可达99.7%。
Abstract
A highly sensitive fiber-optic Fabry-Perot microcavity strain sensor is fabricated using single-mode fibers and a glass capillary tube; the fabricated strain sensor is demodulated using the non-scanning correlation demodulation method. The sensor is fabricated by penetrating two vertically cut single-mode fused silica fibers into a hollow core fused silica fiber and fixing the fibers to both ends of the hollow core fused silica fiber. Thus, the enhanced cavity length-strain sensitivity of the fiber-optic Fabry-Perot microcavity strain sensor is realized. The sensor has a cavity length with micron dimension. The non-scanning correlation demodulation method is used for demodulation based on varying cavity lengths. For a fiber-optic Fabry-Perot microcavity strain sensor with an initial cavity length of 30.129 μm and a hollow core capillary length of 40 mm, the cavity length-strain sensitivity reaches 14.08 nm/με and its linearity is up to 99.7%.
寇琬莹, 王伟, 陈海滨, 张天阳, 吕文涛. 非扫描相关解调光纤法布里-珀罗微腔应变传感器[J]. 激光与光电子学进展, 2019, 56(17): 170630. Wanying Kou, Wei Wang, Haibin Chen, Tianyang Zhang, Wentao Lü. Non-Scanning Correlation Demodulation for Fiber-Optic Fabry-Perot Microcavity Strain Sensor[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170630.