Investigation of the features of elastic wave generation and propagation in Bi12GeO20 crystals using the acousto-optic method

S. V. Kulakov; V. V. Kludzin; V. S. Kulakov

doi:10.1117/12.626038

8 September 2005 Investigation of the features of elastic wave generation and propagation in Bi₁₂GeO₂₀ crystals using the acousto-optic method

S. V. Kulakov, V. V. Kludzin, V. S. Kulakov

Author Affiliations +

Proceedings Volume 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI; 59110G (2005) https://doi.org/10.1117/12.626038
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Acousto-optic methods are widely used not only in devices and systems for radio and optical signal processing, but also for studying physical properties of various materials. The paper presents the results of the investigation of the "non-resonance" (due to native piezoelectric effect) generation of elastic waves at super high frequencies in the Bi₁₂GeO₂₀ crystal, using the acousto-optic method. Acoustic field patterns are visualized in various crystal cuts, including the "degenerated" acoustic mode in the [111] direction in the crystal. Conditions are discussed under which acoustic modes and directions exist with the "self-collimation" effect (abnormally low power spread of acoustic wave). Quantitative estimation of collimation quality is made for various conditions. Experimental characteristics of high-order harmonics generation processes appeared due to elastic non-linearity of the material are found. Basing on the experimental data, some parameters of the elastic non-linearity are evaluated.

Citation Download Citation

S. V. Kulakov, V. V. Kludzin, and V. S. Kulakov "Investigation of the features of elastic wave generation and propagation in Bi₁₂GeO₂₀ crystals using the acousto-optic method", Proc. SPIE 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI, 59110G (8 September 2005); https://doi.org/10.1117/12.626038

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KEYWORDS

Crystals

Acoustics

Bismuth

Acousto-optics

Signal attenuation

Wave propagation

Collimation

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