Related - Real Engineering’s video on The Age of Laser Warfare Has Begun: https://youtu.be/8VLovd9bS5U?si=uO5OI0PnBPLYdSMd
He has some details on how these work.
More tech details at https://en.wikipedia.org/wiki/Iron_Beam
Caution: Do not stare into beam.
Firing rate? How long before it overheats?
That would be classified. Not something you want attackers to know.