Push-pull analysis of photonic Doppler velocimetry measurements

被引:40
作者
Dolan, D. H. [1 ]
Jones, S. C. [1 ]
机构
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
关键词
D O I
10.1063/1.2754405
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
A robust analysis method is presented for multiple-phase heterodyne velocimetry measurements. By combining information from three phase-shifted signals, it is possible to eliminate coherent intensity variations and incoherent light from the measurement. The three data signals are reduced to a pair of quadrature signals, allowing unambiguous calculation of target displacement. The analysis relies on a minimum number of adjustable parameters, and these parameters can be precisely determined from simple interferometer characterization. (C) 2007 American Institute of Physics.
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页数:3
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