It's not that simple. There's a minimum beam size, and passive optics won't let you alter that. https://en.wikipedia.org/wiki/Gaussian_beam#Beam_width_or_spot_

It's not that simple. There's a minimum beam size, and passive optics won't let you alter that. https://en.wikipedia.org/wiki/Gaussian_beam#Beam_width_or_spot_size https://en.wikipedia.org/wiki/Gaussian_beam#Beam_width_or_sp...