Interference signal frequency tracking for extracting phase in frequency scanning interferometry using an extended Kalman filter

被引：21
|
作者：
Liu, Zhe [1 ]
Liu, Zhigang [1 ]
Deng, Zhongwen [1 ]
Tao, Long [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710054, Peoples R China
来源：
APPLIED OPTICS | 2016年 / 55卷 / 11期
基金：
中国国家自然科学基金;
关键词：
RESOLUTION IMPROVEMENT; HILBERT TRANSFORMATION; DOMAIN REFLECTOMETRY; LASER-DIODE; SWEEP; SUPPRESSION; ENCODER; REMOTE; ATLAS; OFDR;
D O I：
10.1364/AO.55.002985
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Optical frequency scanning nonlinearity seriously affects interference signal phase extraction accuracy in frequency- scanning interferometry systems using external cavity diode lasers. In this paper, an interference signal frequency tracking method using an extended Kalman filter is proposed. The interferometric phase is obtained by integrating the estimated instantaneous frequency over time. The method is independent of the laser's optical frequency scanning nonlinearity. The method is validated through simulations and experiments. The experimental results demonstrate that the relative phase extraction error in the fractional part is <1.5% with the proposed method and the standard deviation of absolute distance measurement is <2.4 mu m. (C) 2016 Optical Society of America
引用
收藏
页码：2985 / 2992
页数：8
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