Periodic variations of intensity of diffraction orders in Raman-Nath diffraction

被引：0

作者：

Weng, Cuncheng ^{[1
,2
]}

机构：

[1] College of Physics and Energy, Fujian Normal University, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou,350117, China

[2] Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou,350117, China

来源：

Optik | 2021年 / 232卷

基金：

中国国家自然科学基金;

关键词：

Optical signal processing - Ultrasonics - Phase modulation - Refractive index;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In acousto-optic imaging, the ultrasound-induced optical phase modulation has been widely used in the imaging of biological tissue. However, in Raman-Nath diffraction, the phase of diffracted light has not attracted much attention. Additionally, each order of diffraction has been simply treated as a plane light wave with optical phase shift, and the intensity of diffraction orders hence has been considered to be constant. Then, the phase shift is independent on the diffraction path of light wave in the acousto-optic interaction zone and the corresponding refractive index and the power of the ultrasound wave. Recently, we observe experimentally that the intensity of diffraction orders varies periodically with time. We hence study the periodic variations in depth. It is found that the diffracted light has an ultrasound-induced phase modulation and the periodic variations are due to the phase modulation. © 2021 Elsevier GmbH

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