Adaptive compensation for the nonlinearity error in a heterodyne interferometer

2012 ◽  
Vol 61 (11) ◽  
pp. 1759-1765 ◽  
Author(s):  
Pyungjun Kim ◽  
Kiho Kim ◽  
Kwanho You
Keyword(s):  
Adaptive Compensation ◽  
Nonlinearity Error ◽  
Heterodyne Interferometer

Design and Analysis of Dual-Beam Heterodyne Interferometer

2011 ◽  
Vol 103 ◽  
pp. 177-180
Author(s):  
Ai Song Ju ◽  
Yun Bo Zhang ◽  
Wen Mei Hou
Keyword(s):  
Zeeman Effect ◽  
Optical Path ◽  
Laser Source ◽  
Nonlinearity Error ◽  
Heterodyne Interferometer ◽  
Common Path ◽  
Dual Beam ◽  
The Stability

A dual-beam heterodyne interferometer is designed in this paper. Unlike the Zeeman-effect laser, the two frequencies are generated by two acousto-optic modulators. The different frequency beams are spatial separated, but the optical path comply the principle of common path. Nonlinearity in this system is analyzed in this paper. The periodic nonlinearity error caused by non-ideal laser source is not existed in this system. The stability of this system is tested.

A simple phase-encoding electronics for reducing the nonlinearity error of a heterodyne interferometer

2008 ◽  
Vol 19 (7) ◽  
pp. 075302 ◽  
Author(s):  
Tae Bong Eom ◽  
Jong Ahn Kim ◽  
Chu-Shik Kang ◽  
Byong Chon Park ◽  
Jae Wan Kim
Keyword(s):  
Nonlinearity Error ◽  
Phase Encoding ◽  
Heterodyne Interferometer ◽  
Simple Phase

Research on Phase Compensation of Nonlinearity Error in Heterodyne Interferometer

2012 ◽  
Vol 263-266 ◽  
pp. 435-443
Author(s):  
Xiao Ren ◽  
Wen Mei Hou
Keyword(s):  
Phase Difference ◽  
Phase Compensation ◽  
Nonlinearity Error ◽  
Heterodyne Interferometer ◽  
Control Precision ◽  
Optical Detector ◽  
Novel Method ◽  
High Control ◽  
Simple Phase ◽  
High Order Nonlinearity

A novel method to eliminate nonlinearity error in heterodyne interferometer is studied in the paper. A simple phase compensation system is built and the nonlinearity error is eliminated by rotating the polarizer in front of the optical detector in interferometer according to phase difference signal. The experiments demonstrate that the method is available to eliminate one-order or high-order nonlinearity in heterodyne interferometer. The effects to decrease nonlinearity error depend on high measuring precision of phase difference and high control precision of the rotating polarizer.

TWO FREQUENCY "UNAMBIGUOUS" HETERODYNE INTERFEROMETER BASED ON PHASE LOCKED MILLIMETER-WAVE BAND TRANSCEIVERS

2017 ◽  
Vol 76 (10) ◽  
pp. 903-918
Author(s):  
A. V. Varavin ◽  
G. P. Ermak ◽  
A. S. Vasilev ◽  
A. V. Fateev ◽  
N. V. Varavin ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Wave Band ◽  
Heterodyne Interferometer ◽  
Millimeter Wave Band

High-speed subnanometre interferometry using an improved three-mode heterodyne interferometer

2005 ◽  
Vol 16 (9) ◽  
pp. 1841-1847 ◽  
Author(s):  
Shuko Yokoyama ◽  
Toshiyuki Yokoyama ◽  
Tsutomu Araki
Keyword(s):  
High Speed ◽  
Heterodyne Interferometer
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