中文摘要：

利用相关解调原理研制了非扫描式光纤法-珀解调仪,进行了理论分析和系统优化.仪器以线阵电荷耦合器件（CCD）为光电探测器,结合现场可编程门阵列器件（FPGA）和上位机（ARM）处理,实现信号的实时处理.线性光不均匀性和杂散光所带来的背景噪声,导致不能准确检测出相关信号的极大值.为此,提出了一种能有效滤除背景噪声信号处理算法,提高了仪器对微弱信号的探测能力和稳定性,使其对光纤法-珀传感器腔长测量的相关系数达到0.999 9,测量波动仅为7 nm.实验结果表明,该仪器能实现对传感器腔长的实时测量,且测量精度高,稳定性和一致性好.

英文摘要：

This paper develops a non-scanning fiber Fabry-Perot demodulator based on correlation demodulation theory.Corresponding theoretical analysis and system optimization are completed.The demodulator uses a liner array CCD as photo detector combining the FPGA and ARM controller to achieve real-time signal processing.However,the demodulator can not detect the maximum value of the correlation signal accurately because of the influence of the background noise brought by the unevenness of linear light and the stray light.In order to solve this problem,a signal procession algorithm is proposed.It can filter out the background noise on the correlation signal effectively.Also the detection capability of weak signal and the accuracy of demodulation have been greatly improved,so that the correlation coefficient of the cavity length measurement is 0.999 9 and the fluctuation is only 7 nm.The experimental results indicate that the system can achieve real-time measurement,high measurement accuracy,stability and consistency.