22 October 2004 Collimation properties of space-limited acoustic modes registered using acousto-optic methods in crystals of the langasite family
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Abstract
The influence of elastic anisotropy on effects of power spread in crystals from the langasite family is under study. Conditions for self-collimation directions for which power spread is much less than that for the isotropic variant, are formulated. Directions with the quality of collimation close to the maximum possible value are found in langasite and langatate (LGT) crystals. Presented are computed spatial distributions of acoustic wave power at different distances from the source. Those distributions illustrate the advantages of self-collimation directions. Computed are the angular distributions of collimation coefficients for several planes and the optimal shape for the top electrode is found for resonator structures that uses self-collimation directions in the crystals from the langasite family.
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Sergei V. Kulakov, Victor V. Kludzin, Vladimir S. Kulakov, L. P. Konovalova, "Collimation properties of space-limited acoustic modes registered using acousto-optic methods in crystals of the langasite family", Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); doi: 10.1117/12.566935; https://doi.org/10.1117/12.566935
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