Improved space-marching algorithm for strong acousto-optic interaction of arbitrary fields

Abstract

We present a modification of the beam-propagation algorithm that avoids computer-intensive processing of the sound carrier and instead deals with the slowly varying complex sound profile only. Our three test cases of Gaussian beams with different waists, strongly interacting with a two-dimensional sound column, show excellent agreement with the analytical treatment and with physical experiments performed in our laboratory.

<title>Recent developments and results in 2D acousto-optic light deflection</title>

“…The acosutooptic figure of merit for this eigenmode is about 500-800 * 101) s3lkg. These parameters allows an increase in both bandwidth and processing time, promising high resolution deflectors on the base of formula (2). The design method presented below can be applied also for this material.…”

“…The resolution is defined as the number of the resolvable spots in the image plane of the Bragg cell (for one dimensional deflection given by the formula)' ': N==Afr (2) There is e is the deflection angle range. se the angular spread (divergence) of the deflected beam, Af the frequency bandwidth and c the acoustic processing time of the acoustooptic cell (the time needed for the acoustic beam to travel across the optical beam).…”