The planned laser will be in the 500-kilowatt range. Weapons like these can defend a ship or base against drones or other projectiles.
Lockheed Martin plans to make its most powerful military laser yet, 500 kilowatts::The planned laser will be in the 500-kilowatt range. Weapons like these can defend a ship or base against drones or other projectiles.
biggest issue there would be a) the quantity of atmosphere you have to punch through, and then b) the inverse square law. I know that the GEDI lasers are firing at 1024 nm and 10 mJ. They are on the ISS so not particularly high up ( I suppose the amount of atmosphere is about the same), and they have a spot radius of 25 meters on the ground. GEDI fires at 242 times per second. So something around 242/s * 10 MJ * 0.000278 (MJ/MW) is 0.67276 megawatts? That's seems vaguely reasonable. I've never heard of anyone even considering that they're getting hit by lasers constantly, and if I recall, the number of photos hitting the ground in that system is in the order of thousands to hundreds of thousands (I believe it's hundreds hitting the detector).
So yeah. you'll need a bigger laser. Too much atmosphere.
Lasers like this are mostly useful as defensive weapons. They are good at shooting incoming artillery shells, missiles, and small drones. They don't have the range to be an effective offensive weapon. Kinetic effectors dominate there.
If these existed today, many fewer Ukrainian civilians would be dead from Russian drones and missiles.