Study the Acousto-Optic Spatial Filters Diffracted Light at Zeroth-Order Using MATLAB

International Conference on Materials Engineering and Science

Elham, J.M.^1 ; Aseel, M.A.^1

Al-Mustansiriyah University, Collage of Science, Physics Department, Baghdad, Iraq^1

关键词: Acousto-optic interaction;    Bragg diffraction;    Diffracted light;    High-pass spatial filtering;    Raman;    Nath diffractions;    Spatial filterings;    Weak interactions;    Zeroth order diffraction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/454/1/012134/pdf
DOI  :  10.1088/1757-899X/454/1/012134

来源: IOP

【 摘 要 】

This paper introduces the essentials of acousto-optics with the theory and applications using MATLAB. There are some software used to process acousto-optics filter and the implementation details of any acousto-optics algorithm are inaccessible. Our work is focused on software used to solving the coupled equations in Bragg diffraction by creating MATLAB function for use in Bragg regime and acoustic-optic spatial filtering and employing mainly the MATLAB program for solving this problem. We review the role of acousto-optic and spatial filtering for high-pass spatial filtering. Classically, acousto-optic interactions comprise scattering of photons by energetic phonons into higher and lower orders. Standard weak interaction theory describes diffraction in the Bragg regime as the propagation of a uniform plane wave of light through a uniform plane wave of sound, resulting in the well known first- and zeroth-order diffraction. We investigate Raman-Nath diffraction corresponding to near-Bragg diffraction. A result shows the dependence of various scattered orders on the incident angle/Bragg angle illustrating the Bessel function dependence.