Detection of interference phase by digital computation of quadrature signals in homodyne laser interferometry

0383878 - ÚPT 2013 RIV CH eng J - Článek v odborném periodiku
Řeřucha, Šimon - Buchta, Zdeněk - Šarbort, Martin - Lazar, Josef - Číp, Ondřej
Detection of interference phase by digital computation of quadrature signals in homodyne laser interferometry.
Sensors. Roč. 12, č. 10 (2012), s. 14095-14112. E-ISSN 1424-8220
Grant CEP: GA ČR GAP102/10/1813; GA MŠMT ED0017/01/01; GA MPO FR-TI2/705; GA MPO FR-TI1/241; GA MŠMT EE2.3.30.0054
Institucionální podpora: RVO:68081731
Klíčová slova: digital signal processing * homodyne detection * laser interferometry * optical metrology
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 1.953, rok: 2012

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).
Trvalý link: http://hdl.handle.net/11104/0213681