Simultaneous acousto-optic diffractions by two lobes of a shaped phased-array transducer

IF 3.9 4区 物理与天体物理 0 OPTICS
M. Illienko, Y. Pilgun, Ye. Smirnov
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引用次数: 1

Abstract

. We consider simultaneous diffractions of light by two lobes of sound radiation pattern in an acousto-optic modulator which is built on SiO 2 single crystal and has two-element phased-array transducer with the fixed phase shift  . Implementation of this diffraction type greatly improves power efficiency of the device. Transducer shaping is used to steer the lobes and satisfy the Bragg’s conditions for simultaneous acousto-optic diffractions. The conditions of the diffraction are defined and a mathematical model for calculating diffraction efficiency is suggested. It is shown that a parallel diffraction regime is almost three times more energy-efficient than a serial regime. Several configurations of transducer elements’ shape are analyzed. In particular, changes in the dimensions of diamond-shaped elements are shown to allow adjusting the operating frequency within 23%. An experimental sample of the device is built.
同时声光衍射的两个叶形相控阵换能器
. 本文研究了一种以二氧化硅单晶为材料,具有固定相移的双元相控阵换能器的声光调制器中,光通过两瓣声辐射图同时衍射的问题。这种衍射类型的实现大大提高了器件的功率效率。换能器整形用于引导叶,并满足同时声光衍射的布拉格条件。定义了衍射条件,提出了计算衍射效率的数学模型。结果表明,平行衍射模式比连续衍射模式的效率高近三倍。分析了换能器元件形状的几种构型。特别是,改变菱形元件的尺寸,可以将工作频率调整在23%以内。建立了该装置的实验样品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
9.90
自引率
0.00%
发文量
20
审稿时长
>12 weeks
期刊介绍: “Ukrainian Journal of Physical Optics” contains original and review articles in the fields of crystal optics, piezo-, electro-, magneto- and acoustooptics, optical properties of solids and liquids in the course of phase transitions, nonlinear optics, holography, singular optics, laser physics, spectroscopy, biooptics, physical principles of operation of optoelectronic devices and systems, which need rapid publication. The journal was founded in 2000 by the Institute of Physical Optics of the Ministry of Education and Science of Ukraine.
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