Eta Carinae
laserstars.org
laserstars.org
I love http://en.wikipedia.org/wiki/Nominative_determinism. :)
Nitrogen lasers are like that. If you have a high voltage power supply, you could make a nitrogen laser in an afternoon, and no optics are required at all. Bonus: not even a container is required, since it can lase at room temperature and pressure, even when mixed with oxygen.