传感技术学报2017，Vol.30Issue(4)：529-534,6.DOI:10.3969/j.issn.1004-1699.2017.04.008
基于压电陶瓷相位调制器的外调制相位生成载波法研究
Study of Phase Generated Carrier Method Based on External PZT Phase Modulator
摘要
Abstract
The external modulation phase-generated carrier(PGC)method based on piezoelectric transducer(PZT)is theoretically and experimentally investigated.The PZT phase modulator changes the length of winding fibers by electrostrictive effect to realize periodic phase modulation.The carrier is contained in the output interference signals when the phase modulator is inserted into the reference arm of a Mach-Zehnder Interferometer(MZI).Numerical simulations are carried out to study the influence of modulation parameters on PGC demodulation results.And feasibility of the scheme is verified by experiments.Phase demodulation is successfully achieved in a 200 m long MZI,and the original phase information on sensing arm is recovered by using NI Data Acquisition System and demodulation algorithm written by Labview,the correlation coefficient between demodulation results and original signals is above 0.99.关键词
压电换能器/相位生成载波/光纤干涉仪/相位解调Key words
piezoelectric transducer/phase-generated carrier/optical fiber interferometer/phase demodulation分类
信息技术与安全科学引用本文复制引用
巩玲仙,邵贵成,田竹梅,王春灿,付建梅,王爱珍..基于压电陶瓷相位调制器的外调制相位生成载波法研究[J].传感技术学报,2017,30(4):529-534,6.基金项目
山西省高校"131"领军人才工程项目(智能化交通信号控制系统) （智能化交通信号控制系统）
忻州师范学院教学改革研究项目(JGZD201509) （JGZD201509）
IAI-CDIO理念下通信类实践课程的教学模式研究项目(J2016097) （J2016097）
