Detection of Interference Phase by Digital Computation of Quadrature Signals in Homodyne Laser Interferometry
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ID: 116225
2012
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Abstract
We have proposed an approach to the interference phase extraction in the homodyne laser interferometry. The method employs a series of computational steps to reconstruct the signals for quadrature detection from an interference signal from a non-polarising interferometer sampled by a simple photodetector. The complexity trade-off is the use of laser beam with frequency modulation capability. It is analytically derived and its validity and performance is experimentally verified. The method has proven to be a feasible alternative for the traditional homodyne detection since it performs with comparable accuracy, especially where the optical setup complexity is principal issue and the modulation of laser beam is not a heavy burden (e.g., in multi-axis sensor or laser diode based systems).
| Reference Key |
rerucha2012sensorsdetection
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|---|---|
| Authors | Simon Rerucha;Zdenek Buchta;Martin Sarbort;Josef Lazar;Ondrej Cip;Rerucha, Simon;Buchta, Zdenek;Sarbort, Martin;Lazar, Josef;Cip, Ondrej; |
| Journal | sensors |
| Year | 2012 |
| DOI |
10.3390/s121014095
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| URL | |
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