基于保偏光纤环镜的光纤光栅传感解调

研究了基于保偏光纤的光纤环镜结构并建立理论模型,分析各参数之间的关系,设计并搭建了基于偏振干涉的保偏光纤环镜传感解调系统.以LabVIEW作为软件平台,依据理论模型,开发了光纤光栅传感嚣解调控制系统,不仅实现了对解调系统的远程控制、数据采集、图形化显示及数据存储,节省了成本,还能直接获得待测参量值.采用可调谐激光器模拟光纤光栅反射波长的变化,实验证明了该解调方案的可行性和正确性.温度传感检测实验表明,该系统对温度的测量平均精度可达0.03℃,准确度为±0.01℃.

Abstract：

The loop mirror structure based on the polarization-maintaining fiber was investigated, the corresponding theoretical model was established, and the relations of these parameters are also analyzed. The sensor demodulation system of the polarization-maintaining fiber loop mirror based on polarization interference was designed and established. Using LabVIEW as the software platform, the demodulation control system for the fiber grating sensor was developed based on the theoretical model, realizing the remote control of the demodulation system, diagrammatic display and data acquisition and storage. With this scheme, the cost is reduced and the measured parameters can be directly obtained. The fluctuation of the reflection wavelengths of the fiber grating was simulated with the tunable laser, and the feasibility and validity of this scheme were confirmed by experiments. Detection experiments with temperature sensors show that the average temperature measuring precision can be up to 0.03 ℃ and the accuracy is ±0.1 ℃.

Sensor Demodulation of Fiber Grating Based on Polarization-maintaining Fiber Loop Mirror

The loop mirror structure based on the polarization-maintaining fiber was investigated, the corresponding theoretical model was established, and the relations of these parameters are also analyzed. The sensor demodulation system of the polarization-maintaining fiber loop mirror based on polarization interference was designed and established. Using LabVIEW as the software platform, the demodulation control system for the fiber grating sensor was developed based on the theoretical model, realizing the remote control of the demodulation system, diagrammatic display and data acquisition and storage. With this scheme, the cost is reduced and the measured parameters can be directly obtained. The fluctuation of the reflection wavelengths of the fiber grating was simulated with the tunable laser, and the feasibility and validity of this scheme were confirmed by experiments. Detection experiments with temperature sensors show that the average temperature measuring precision can be up to 0.03 ℃ and the accuracy is ±0.1 ℃.