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Proceedings Paper

Highly-sensitive adaptive interferometer for ultrasound detection
Author(s): Alexei A. Kamshilin; Erik Raita; A. I. Grachev
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Paper Abstract

We present a novel phase demodulation technique in which two speckled waves with different polarization states are coupled in a photorefractive crystal subjected to application of a fast-oscillating ac-electric field. It is shown that the sensitivity of an interferometer with a Bi12TiO20 crystal based on this technique is only 1.5 times worse than the classical homodyne detection limit. To the best of our knowledge, this is the most sensitive adaptive photorefractive interferometer ever reported.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.524869
Show Author Affiliations
Alexei A. Kamshilin, Univ. of Joensuu (Finland)
Erik Raita, Univ. of Joensuu (Finland)
A. I. Grachev, A.F. Ioffe Physico-Technical Institute (Russia)


Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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