Share Email Print
cover

Optical Engineering

Theoretical and experimental analysis of the near-Bragg acousto-optic effect
Author(s): Cheng-Chung Wang; Chen-Wen Tarn
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

A spatial Fourier transform approach is employed to investigate the acousto-optic interaction in the near-Bragg regime with cw planar sound and a light beam of arbitrary spatial profile. Four coupled differential equations that can exactly describe the near-Bragg acoustooptic interaction are derived from Maxwell’s equations. A spatial Fourier transform approach is applied to the coupled-wave equations to express the interaction in the spatial frequency domain. The spatial Fourier transform approach used here is identical to the technique for solving the paraxial wave equation to derive the transfer function of propagation and hence the Fresnel diffraction formula during free-space propagation of a light beam in the presence of diffraction. Since there are no analytic solutions for these coupled equations, a well-known numerical method, viz., the Runge-Kutta-Fehlberg, is used to solve the equations. Detailed numerical simulation is performed, which involves spatially Fouriertransforming the input light beam profile to calculate the spectra of the diffracted light beam and hence their profiles in the space, using the inverse transform. Experimental results are also presented to check the validity of our approach.

Paper Details

Date Published: 1 January 1998
PDF: 7 pages
Opt. Eng. 37(1) doi: 10.1117/1.602014
Published in: Optical Engineering Volume 37, Issue 1
Show Author Affiliations
Cheng-Chung Wang, National Taiwan Institute of Technology (Taiwan)
Chen-Wen Tarn, National Taiwan Institute of Technology (Taiwan)


© SPIE. Terms of Use
Back to Top