强度解调的光纤光栅高频传感系统研究

摘要：在对光纤光栅强度解调方法研究的基础上，利用FastFET放大器AD8065设计了高频光电转换电路，并基于边缘滤波强度解调原理构建了光纤光栅高频振动解调系统。该系统具有成本低、解调速度快等特点。在实验中，使用电子电路仿真软件Multisim的仿真实验与构建的光纤光栅高频振动解调系统进行对比。仿真实验和实际实验结果均表明，光纤光栅高频振动解调系统的振动测量具有良好的幅频响应，频率响应范围可达5Hz~1000Hz，为光纤光栅高频动态测量提供了一种新的可靠手段。

High-frequency Fiber Bragg Grating Sensing System Research based on intensity demodulation

Abstract: On the basis of the hardware circuit research on the Fiber Bragg Grating intensity demodulation, FastFET amplifier AD8065 is utilized to design high-speed photoelectric conversion circuit and a high-speed vibration fiber grating demodulation system is built based on the principle of edge filtering intensity demodulation. The system has advantages of low cost, high speed and so on. In the experiments, simulation experiments results from National Instruments (NI) Ltd Electronic Multisim circuit simulation software are used to compare with the results of the fiber grating vibration demodulation system. Simulation and actual experimental results show that the system has good frequency response, which is up to 5Hz~1000Hz. It provides a new mean for High-speed fiber grating dynamic measurement.