激光技术2013，Vol.37Issue(1)：36-39,4.DOI:10.7510/jgjs.issn.1001-3806.2013.01.009
光纤光栅解调系统的寻峰算法研究
Research of peak-detection algorithm in a fiber grating demodulation system
摘要
Abstract
In order to improve the precision of peak-detection of a fiber Bragg grating demodulation system, it was studied based on the premature convergence characteristics of the genetic algorithm. It was expounded how the genetic algorithm can improve the accuracy of fiber Bragg grating demodulation. Taking a fiber Bragg grating demodulation system based on fiber Fabry-Perot(F-P) wavelength filter as example, the feasibility and reliability of the algorithm were testified. The peak reflected spectrum of the fiber Fabry-Perot filter fiber Bragg grating demodulation system was detected with MATLAB and its central wavelength was obtained. The effect of initial population number, genetic algebra, mutation rate on the peak detection of the algorithm was analyzed and a set of optimal parameters were obtained. The precision was equal or less than 3 pm, standard deviation was less than 0.5pm for 50 repetition computations. The results show that the algorithm is stable, effective, and practical, can significantly reduce the noise of a fiber grating sensor system, improve the precision of demodulation.关键词
传感器技术/光纤布喇格光栅解调/F-P腔滤波器/遗传算法Key words
sensor technique/fiber Bragg grating demodulation/F-P wavelength filter/genetic algorithm分类
信息技术与安全科学引用本文复制引用
张天地,贺锋涛,周强,贾琼瑶,李雪峰..光纤光栅解调系统的寻峰算法研究[J].激光技术,2013,37(1):36-39,4.基金项目
国家自然科学基金资助项目(60878060) （60878060）
