Asymmetric channel isolation in multichannel acousto-optic cells made of tellurium dioxide crystal

Sergei V. Kulakov; Victor V. Kludzin; Victor V. Molotok; Vladimir S. Kulakov

doi:10.1117/12.454018

23 January 2002 Asymmetric channel isolation in multichannel acousto-optic cells made of tellurium dioxide crystal

Sergei V. Kulakov, Victor V. Kludzin, Victor V. Molotok, Vladimir S. Kulakov

Proceedings Volume 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage; (2002) https://doi.org/10.1117/12.454018
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

Citation Download Citation

Sergei V. Kulakov, Victor V. Kludzin, Victor V. Molotok, and Vladimir S. Kulakov "Asymmetric channel isolation in multichannel acousto-optic cells made of tellurium dioxide crystal", Proc. SPIE 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage, (23 January 2002); https://doi.org/10.1117/12.454018

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KEYWORDS

Acoustics

Crystals

Acousto-optics

Transducers

Anisotropy

Diffraction

Wave propagation

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