Application of SLM generated patterns for laser-ultrasound

C. M. Grunsteidl, I. Veres, T. Berer, P. Burgholzer
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引用次数: 4

Abstract

We use a spatial light modulator to shape the excitation laser spot of a laser-ultrasound system. With periodic excitation patterns we are able to excite ultrasound waves of a particular, single wavelength. In combination with temporal intensity modulation of the excitation laser, only waves of specific wavelength and frequency are generated. We experimentally validated this principle and applied the method to scan the two-dimensional dispersion relation of surface acoustic waves on coated samples. Results obtained with different periodic patterns were compared. We also used the setup to produce laser spots of different size to study the excitability of Lamb modes.
SLM生成图形在激光超声中的应用
我们使用空间光调制器来塑造激光超声系统的激发激光光斑。有了周期性的激发模式,我们就能激发出特定的、单一波长的超声波。结合激发激光的时间强度调制,只产生特定波长和频率的波。实验验证了这一原理,并应用该方法扫描了涂层样品表面声波的二维色散关系。比较了不同周期模式得到的结果。我们还利用该装置制备了不同尺寸的激光光斑,以研究Lamb模式的激发性。
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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