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Proceedings Paper

Ultrasonic light diffraction in optically isotropic media with induced birefringence
Author(s): Erik Blomme; Antoni Sliwinski
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Paper Abstract

Optically isotropic media which are susceptible to acoustically induced birefringence can be used as acousto- optic polarization converters. A comparative study between fused silica and dense flint shows that at normal light incidence 52% of the light can be converted from linear to circular in the case of fused silica and only 20% in the case of dense flint. In each case the conversion appears at moderate sound amplitudes and at frequencies which are typical for the intermediate regime of diffraction. Applying oblique light incidence, most interesting effects can be obtained with fused silica at high sound frequencies which are typical for the Bragg regime of diffraction and in the neighborhood of the Bragg angle. The possibility is shown to use an AO cell fabricated of fused silica as a laser-beam splitter, converting a linearly polarized beam of light partially into a circularly polarized beam and a linearly polarized beam, the light intensity of the two beams being equal. In addition, it is seen that the temporal light intensity modulations which can be observed in the near field of the light diffracted under these specific conditions, can be understood from the polarization changes taking place.

Paper Details

Date Published: 6 November 2001
PDF: 8 pages
Proc. SPIE 4514, Acousto-Optics and Applications IV, (6 November 2001); doi: 10.1117/12.447616
Show Author Affiliations
Erik Blomme, Vrij Hoger Instituut voor Technologie en Informatica (Belgium)
Antoni Sliwinski, Univ. of Gdansk (Poland)

Published in SPIE Proceedings Vol. 4514:
Acousto-Optics and Applications IV

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