Acousto-optic Bragg diffraction in paratellurite by the sidelobes of the spatial radiation spectrum of an acoustic transducer

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• 作者：V. M. Kotov
• 关键词：acousto ; optic diffraction ; Bragg diffraction regime ; isotropic and anisotropic diffractions ; paratellurite crystal ; “slow” shear acoustic wave ; sidelobes ; spatial radiation spectrum of an acoustic transducer ; microwave signal
• 刊名：Acoustical Physics
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：62
• 期：5
• 页码：532-536
• 全文大小：604 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Acoustics
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-6865
• 卷排序：62

文摘

Acousto-optic Bragg diffraction in paratellurite is investigated within the two first diffraction orders for the case of diffraction by the sidelobes of the spatial radiation spectrum of an acoustic transducer. One of the diffraction orders is due to anisotropic diffraction, and the other, to isotropic diffraction. Such a diffraction regime is achieved when the diffraction plane is inclined toward the optical axis of the crystal. For light with a wavelength of 0.63 × 10–4 cm diffracted by a “slow” sound wave with a frequency of 26 MHz, the effect manifests itself when the angle between the acousto-optic diffraction plane and the optical axis of paratellurite is ~3°. The effect is experimentally verified. The diffraction efficiency is 20% for each of the diffraction orders for a microwave signal of 8 V at the transducer.