Laser Weaponry

Space Lasers
Space or vacuum lasers are lasers based upon the 'vacuum frequencies' (electromagnetic waves of under 200 nanometers) which, although useless inside of a planetary atmosphere, penetrate the plasma produced when they hit a target meaning that firing does not have to be conducted in pulses to allow the plasma to clear.

Ground lasers
Ground or atmospheric lasers are lasers which use 'atmospheric frequencies' (waves over 200 nanometers) which although unable to penetrate the plasma they produce (forcing them to be fired in pulses) are able to go through the atmosphere.