三波长数字相位解调法解调误差及影响因素

发布时间：2018-01-16 13:03

  本文关键词：三波长数字相位解调法解调误差及影响因素　出处：《北京航空航天大学学报》2017年08期 　论文类型：期刊论文

  更多相关文章： 非本征法布里-珀罗干涉型(EFPI) 三波长数字相位解调 解调误差 影响因素 稳定性

【摘要】：介绍了光纤法布里-珀罗(F-P)传感器的传统解调方法,系统地推导了针对非本征法布里-珀罗干涉型(EFPI)传感器解调的三波长数字相位解调法的解调原理,仿真和实验分析了三波长数字相位解调法的解调误差。仿真分析结果表明,相位偏离正交关系是限制解调的最主要因素,要保证解调误差在15 nm以内,腔长变化应小于在正交腔长处2μm的范围。采用3个独立的激光光源进行实验,实验结果表明,在正交腔长附近1μm范围内变化,解调腔长误差小于12 nm,重复性误差小于10 nm,解调具有良好的稳定性。
[Abstract]:The traditional demodulation method of fiber optic Fabry-Perot (F-P) sensor is introduced. The demodulation principle of three-wavelength digital phase demodulation for extrinsic Fabry-Perot interferometric (EFPI) sensor is systematically derived. The demodulation error of the three-wavelength digital phase demodulation method is analyzed by simulation and experiment. The simulation results show that the phase deviation from the orthogonal relationship is the most important factor limiting the demodulation, and the demodulation error should be guaranteed to be within 15 nm. The change of cavity length should be smaller than that in the range of 2 渭 m in the quadrature cavity. Three independent laser sources were used to carry out the experiment. The experimental results show that the variation is in the range of 1 渭 m near the length of the orthogonal cavity. The error of demodulation cavity length is less than 12 nm, the repeatability error is less than 10 nm, and the demodulation has good stability.
【作者单位】： 北京航空航天大学仪器科学与光电工程学院;
【基金】：国家自然科学基金(61575013)~~
【分类号】：TP212
【正文快照】： 网络出版地址:www.cnki.net/kcms/detail/11.2625.V.20161116.1552.004.html引用格式:赵文涛,宋凝芳,宋镜明,等.三波长数字相位解调法解调误差及影响因素[J].北京航空航天大学学报,2017,43(8):1654-1661.ZHAO W T,SONG N F,SONG J M,et al.Demodulation error and influencing，

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