中文摘要：

对Fabry-Perot（F-P）可调谐光滤波器进行了非线性校正,实现了动态应变传感系统的优化设计,利用该系统完成了应变参量的动态检测与实时解调。本系统无需检测光栅反射谱的实际位置,仅需检测光栅反射谱的变化量即可实现应变量的传感解调。采用二次曲线拟合法对F-P可调谐光滤波器的驱动电压进行非线性校正,在50 nm范围内波长调谐的平均误差降低64.6%,最大误差降低33.8%。采用校正电压驱动F-P可调谐光滤波器进行动态应变传感时波长位置检测的误差降低64.3%。引入移位平均算法后,系统动态应变传感的灵敏度优于3με,实测应变量与理论计算结果之间的误差小于5%。

英文摘要：

The nonlinearity of Fabry-Perot （F-P） tunable filter is rectified, based on which the optimized de- sign of dynamic strain sensing system is achieved. Dynamic detection and real-time demodulation of strain parameter are realized using this system. Strain can be demodulated only by detecting the shift of the grat- ing reflection spectrum position instead of detecting the exact position of the reflection spectrum. The drive voltage is rectified using conic fitting algorithm. The experiment results demonstrate that the average error and the maximum error of the tuning wavelength are decreased by 64. 6% and 33. 8% respectively in the range of 50 nm. The wavelength interrogation error of the system is reduced by 64. 3% when the F-P tuna- ble filter is driven by rectified drive voltage. The strain sensitivity of the system is less than 3 με by use of shift average algorithm. The error between the practical value demodulated by the system and the theoreti- cal value is 5 % below.