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Proceedings Paper

Asymmetric channel isolation in multichannel acousto-optic cells made of tellurium dioxide crystal
Author(s): Sergei V. Kulakov; Victor V. Kludzin; Victor V. Molotok; Vladimir S. Kulakov
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Paper Abstract

Direction [110] in the TeO2 crystal has unique acoustic and acousto-optic properties. This direction is widely used in many applications. But a slow shear acoustic wave traveling in this direction looks very unpromising for multichannel acousto-optic cells because of its low channel- to-channel isolation under reasonable channel package density. This low isolation is due to the abnormally high physical spread of this slow shear wave traveling in the [110] direction, and the therefore high value of the acoustic anisotropy coefficient b equals 26. During recent investigations, a direction exhibiting self-collimation with the coefficient b approximately equals 0.3 was found. This direction lies in the optical plane under the angle of 29 degree(s) with respect to the [110] axis. But the acousto-optic figure of merit M2 appears smaller for this direction. A number of directions in the TeO2 crystal's optical plane combining acceptable values of the acousto-optic figure of merit M2 and channel-to-channel insulation under high channel package density have been experimentally and theoretically studied. Discussed and analyzed are the features of these directions when they are used in multichannel acousto-optic cells with the wideband anisotropic diffraction.

Paper Details

Date Published: 23 January 2002
PDF: 6 pages
Proc. SPIE 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage, (23 January 2002); doi: 10.1117/12.454018
Show Author Affiliations
Sergei V. Kulakov, St. Petersburg State Univ. of Aerospace Instrumentation (Russia)
Victor V. Kludzin, St. Petersburg State Univ. of Aerospace Instrumentation (Russia)
Victor V. Molotok, St. Petersburg State Univ. of Aerospace Instrumentation (Russia)
Vladimir S. Kulakov, St. Petersburg State Univ. of Aerospace Instrumentation (Russia)


Published in SPIE Proceedings Vol. 4459:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage
Shizhuo Yin; Francis T. S. Yu; Hans J. Coufal; Hans J. Coufal, Editor(s)

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