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Optics Letters

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  • Vol. 13, Iss. 5 — May. 1, 1988
  • pp: 339–341

Two-wavelength laser interferometry using superheterodyne detection

R. Dändliker, R. Thalmann, and D. Prongué  »View Author Affiliations


Optics Letters, Vol. 13, Issue 5, pp. 339-341 (1988)
http://dx.doi.org/10.1364/OL.13.000339


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Abstract

In two-wavelength interferometry, synthetic wavelengths are generated in order to reduce the sensitivity or to extend the range of unambiguity for interferometric measurements. Here a novel optoelectronic technique, called superheterodyne detection, is presented, which permits measurement of the phase difference of two optical frequencies that cannot be resolved by direct optoelectronic heterodyne detection. This technique offers the possibility for operation of two-wavelength interferometry in real time with arbitrary synthetic wavelengths from micrometers to meters in length. Preliminary experimental results are reported. An optical arrangement for absolute range-finding applications using tunable-laser sources (e.g., semiconductor lasers) is proposed.

© 1988 Optical Society of America

History
Original Manuscript: November 13, 1987
Manuscript Accepted: January 27, 1988
Published: May 1, 1988

Citation
R. Dändliker, R. Thalmann, and D. Prongué, "Two-wavelength laser interferometry using superheterodyne detection," Opt. Lett. 13, 339-341 (1988)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-13-5-339


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