Wow that is fascinating. No I haven't tried that one but I do have a book caller the laser cookbook I bought in the pre internet days.
It's a pretty low tec experiment but quiet interesting.
Get a cheap laser diode and decouple the current limiting section of it's driver and dip the laser in liquid nitrogen.... The beam diverges greatly but boy does the power go up. By a factor of 50-300 times I think the book said. It was so long ago can't remember all the details but it worked and it didn't seem to do to much damage to the laser.
Where I worked at the time, let me take home a liter in a thermos. It lasted a day in the fridge.
I'm back in Perth from the 16th til the 19th we should catch up.
It's not everyday you meet a PL member from Perth.