Disturbance-free phase-shifting laser diode interferometer using adaptive feedback control

被引:3
作者
Suzuki, Takamasa [1 ]
Takahashi, Tsutomu [1 ]
Sasaki, Osami [1 ]
机构
[1] Niigata Univ, Fac Engn, Niigata 9502181, Japan
关键词
MODULATION; SYSTEM;
D O I
10.1364/AO.48.005561
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A feedback-control-equipped phase-shifting laser diode interferometer that eliminates external disturbance is proposed. The feedback loop is stabilized by adaptive control of the polarity of the interference signal. Conventional phase-shifting interferometry can be used with the feedback control, resulting in simplified signal processing and accurate measurement. Several experiments confirm the stability of the feedback control with a measurement repeatability of 1.8nm. (C) 2009 Optical Society of America
引用
收藏
页码:5561 / 5566
页数:6
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