ABCD

ABCD Gaussian Beam Propagation Software allows you to propagate laser beams through standard optical elements (free space, dielectric, thin lens, curved mirror, gaussian duct and dielectric interface).

It can be used as a research tool for people working in optics labs and might be useful as a teaching aid for an undergraduate-level entry course in modern optics. It is available for Macintosh only and was tested on MacOS 8, 9 and OS X 10.1, but should work fine on 7.5.x.