Improvement of speckle statistics in double-wavelength superheterodyne interferometry

Year: 1995

Authors: Dandliker R., Geiser M., Giunti C., Zatti S., Margheri G.

Autors Affiliation: Institute of Microtechnology,University of Neuchatel, CH-2000 Neuchatel, Switzerland;
Officine Galileo s.p.a., Via Einstein 35, 50013 Campi Bisenzio Firenze, Italy;
Istituto Nazionale di Ottica, largo e. fermi 6, Firenze, Italy

Abstract: In this paper we analyze the probability density function of the superheterodyne signal obtained in a two-wavelength interferometer from the beat of a local oscillator laser beam with a speckled return beam Theoretical investigation shows that, by using an increased number of spatially one can improve noticeably the detection probability of the superheterodyne Experimental results obtained with a four-quadrant detector are in good agreement with theory.

Journal/Review: APPLIED OPTICS

Volume: 34 (31)      Pages from: 7197  to: 7201

KeyWords: Heterodyne interferometry; speckle,; speckle statistics

Citations: 9
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