YT2095: Heh, I love the common-use 'laser', meaning anything that is done with the EM spectrum that's not radio or TV based.
Ahh, Peltiers. I'm considering using one of those in conjunction with my next overclocked PC, either that or watercooling. I imagine you'd have an easier time of it though, the cooling stage would be isolated from the optics stage, yah? I've heard some horror stories of Peltiers causing motherboards to be rotted through with condensation.