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Proceedings Paper

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

Paper Details

Date Published: 8 September 2005
PDF: 9 pages
Proc. SPIE 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI, 59110G (8 September 2005); doi: 10.1117/12.626038
Show Author Affiliations
S. V. Kulakov, St. Petersburg State Univ. for Aerospace Instrumentation (Russia)
V. V. Kludzin, St. Petersburg State Univ. for Aerospace Instrumentation (Russia)
V. S. Kulakov, St. Petersburg State Univ. for Aerospace Instrumentation (Russia)


Published in SPIE Proceedings Vol. 5911:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI
Francis T. S. Yu; Ruyan Guo; Shizhuo Yin, Editor(s)

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