The last ABM laser was so big it took up the front end of a 767. That's going to have to be a big ass drone.
Some what related. Just released today. Report to Congress on Navy Laser, Railgun and Hypervelocity Projectiles https://news.usni.org/2017/06/15/re...230369141&mc_cid=ff217e3cb7&mc_eid=2aedd16e3c
Looks like the Army already beat `em to it... Navy Likely to Be First Service to Field Laser Weapons, Expert Says 22 Mar 2018 - If one service has made sufficient progress to use laser weapons in its arsenal in the next few years, it's the U.S. Navy. See also: Raytheon's Laser Dune Buggy Set to Fry Enemy Quadcopters 20 Mar 2018 - The funny-looking vehicle promises to give maneuver formations defense against drones.