数据采集与处理2018，Vol.33Issue(1)：12-21,10.DOI:10.16337/j.1004-9037.2018.01.002
迟滞和蠕变补偿的F-P滤波器波长解调方法研究
Study on F-P Filter-Based Wavelength Demodulation Method with Hysteresis and Creep Compensation
摘要
Abstract
Tunable Fabry-Perot(F-P)filter-based demodulation methods are more used in the wavelength demodulation of fiber Bragg grating(FBG).However,the hysteresis and creep of the piezoelectric ce-ramic(Pb(Zr1-xTix)O3,PZT)in the F-P filter make the output wavelength of the F-P filter nonlinearly change with time,resulting in the problems of large wavelength demodulation error and low sensing accu-racy.In this paper,we start with the study of hysteresis and creep characteristics of PZT in F-P filters, and propose an F-P filter-based wavelength demodulation method based on thermal etalon and hysteresis and creep compensation control of the PZT.The driving voltage of PZT is controlled to change nonlinear-ly with time so that the wavelength of the broadband light source output through the F-P filter can be changed at equal intervals with time.The peak wavelength of the etalon transmission spectrum is thus obtained and also changes linearly with time.It acts as a "tick"for the wavelength scale and provides an accurate wavelength reference for demodulating the wavelength of the sensing grating.The experimental results of the FBG temperature measurement show that,compared with the method without hysteresis and creep compensation control,the proposed method improves the temperature measurement accuracy about 20 times and the temperature measurement error is less than 0.5 ℃.关键词
光纤传感/F-P滤波器/波长解调方法/迟滞蠕变补偿Key words
optic-fiber sensing/F-P filter/wavelength demodulation method/hysteresis and creep com-pensation分类
信息技术与安全科学引用本文复制引用
路元刚,王缘,彭楗钦,杨雁南,赵宁,王同光..迟滞和蠕变补偿的F-P滤波器波长解调方法研究[J].数据采集与处理,2018,33(1):12-21,10.基金项目
国家自然科学基金(61377086)资助项目 （61377086）
国家重点基础研究发展计划(九七三计划)(2014CB046200)资助项目 （九七三计划）
航空科学基金(2016ZD52042)资助项目 （2016ZD52042）
苏州市应用基础研究计划(SYG201546)资助项目 （SYG201546）
江苏省自然科学基金重点(BK20140059)资助项目 （BK20140059）
江苏省高校优势学科建设工程资助项目. （）
