Author： Rerucha Simon Buchta Zdenek Sarbort Martin Lazar Josef Cip Ondrej
Publisher： MDPI
E-ISSN： 1424-8220|12|10|14095-14112
ISSN： 1424-8220
Source： Sensors, Vol.12, Iss.10, 2012-10, pp. : 14095-14112
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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).
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