Gaussian beams, thick lenses, large wavelengths

shwathshav

Dear users,

I am looking for a tool that can simulate (or calculate) Gaussian beam propagation though thick lenses. I am particularly interested to simulate the optimal distance of two lenses and optimal focusing at the Gaussian beam waste. The focus length of the lenses are about 40mm (lens diameter ca. 40mm), their distance should be about 8-10cm, and the overall distance from focus to focus should be then 160-180mm. The wavelength is 10-0.1mm. Can anybody recommended a suitable tool (freeware/paidware), please?

I have confirmed OSLO is not suited. Zemax can make it, but it seems like killing a fly with a bazooka...

Thanks,