中文摘要：

针对光纤Fabry-Perot （F-P）传感器在实际应用中,受外界环境干扰,造成输出精度较低,提出了一种采用波分复用器（DWDM）输出两路正交信号的双波长稳定系统.基于微分进化（DE）算法建立了光纤F-P传感系统的双波长稳定优化模型,设计了一高正交精度传感系统,构建了传感系统正交实验方案,研究了其正交输出特性和正交误差.结果表明,DE算法运行速度快,能在较短运行时间内得到全局最优解,可很好的用于光纤F-P传感系统结构优化,误差小于10-3;设计的传感系统具有较高的正交输出精度,当腔长变化为-1～1 μm时,两路工作波长相位差接近π/2,传感系统正交误差均小于6％,具有良好的稳定性和抗干扰能力,能满足实际需求.

英文摘要：

Aiming at the low output precision and easy-to-interfere of the optical fiber Fabry-Perot （F-P） sensor in the applications,a dual wavelength stabilization system in which two orthogonal signals are outputted by DWDM is proposed.The stable optimization model of dual wavelength optical fiber F-P sensing system was established based on DE algorithm.A higher orthogonal precision sensing system was designed and the orthogonal experiment scheme of sensing system was built.The orthogonal output characteristics and orthogonal error of sensing system were studied.The results show that the differential evolution（DE） algorithm is fast in running and the global optimal solution can be attained in shorter run time.The error is less than 10-3.It can be used for the structural optimization design of optical fiber F-P sensor.The designed sensing system has higher orthogonal output precision.When the length of F-P cavity changes from-1～ 1μm,the orthogonal error of sensing system is all less than 6 ％ and the phase difference of two light waves is approaching to π/2.It has high stability and anti-interference ability,and can meet the practical requirements.