Simple method for reducing the first-order optical nonlinearity in a heterodyne laser interferometer.
Appl Opt
; 54(20): 6321-6, 2015 Jul 10.
Article
em En
| MEDLINE
| ID: mdl-26193410
ABSTRACT
A simple method was proposed by using a tunable attenuator fitted in the reference or measurement arm of a heterodyne laser interferometer to adjust the values of mixing laser beams while the spectrum of the measurement signal is monitored using a signal analyzer. The effectiveness of the proposed method in reducing the first-order optical nonlinearity was verified through experiments. Results indicated that the peak value of the first-order optical nonlinearity could be reduced from 5.15 to 0.24 nm. It was therefore concluded that the proposed method was applicable to ultraprecision laser interferometry.
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MEDLINE
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En
Ano de publicação:
2015
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Article