光纤光栅传感器阵列化与温度补偿研究

Research on Temperature Compensation for Fiber Grating Array Sensors

利用啁啾光纤Bragg光栅(FBG)反射和长周期FBG边沿滤波,提出并实现了一种综合的FBG传感快速解调方案。封装1对FBG进行应变差动传感、同时消除温度影响,不增加波长资源占用并使应变灵敏度得到有效提高,温度影响在很大范围内几乎为0。在全光纤化解调温度补偿型传感的基础上,研究了两路时分复用的设计方法,给出了时分链路间延迟光纤与光脉冲和解调端时分选通门的关系,实验结果与理论分析吻合。

Based on the chirp fiber Bragg grating （FBG） and edge filter technique,a highspeed sensor multiplexing network system is designed and realized. By using two FBGs as strain differential sensor, the sensor unit of the system compensates the temperature effects and the total variation in wavelength difference within a large range of temperature is nearly 0. The stress sensitivity has been amplified efficiently and the wavelength resource possession does not increase. According to the system with double channel time-division multiplexing, the relationship between the length of delay fiber and the optical pulse and time-division gate array is analyzed,which coincides with the experimental results.