The YAL used a COIL and was a megawatt class laser. HELLADS envisions a 150 kW laser on an airborne platform but as FBW points out, this would not be a fighter but something more like an AC-130 which SOCOM is pursuing at the moment. Of course there is also the B-21 which is in development and it is pretty safe to assume that it would have a DEW, or its design able to absorb a DEW solution at a later date.

The goal of the HELLADS program is to develop a 150 kilowatt (kW) laser weapon system that is ten times smaller and lighter than current lasers of similar power, enabling integration onto tactical aircraft to defend against and defeat ground threats. With a weight goal of less than five kilograms per kilowatt, and volume of three cubic meters for the laser system, HELLADS seeks to enable high-energy lasers to be integrated onto tactical aircraft, significantly increasing engagement ranges compared to ground-based systems.

In May 2015, HELLADS demonstrated sufficient laser power and beam quality to advance to a series of field tests. The achievement of government acceptance for field trials marked the end of the program’s laboratory development phase and the beginning of a new and challenging set of tests against rockets, mortars, vehicles and surrogate surface-to-air missiles at White Sands Missile Range, New Mexico.

Integration of the HELLADS laser into a ground-based laser weapons system demonstrator began in July 2015 as an effort jointly funded by DARPA and the Air Force Research Laboratory. Following the field-testing phase, the goal is to make the system available to the military Services for further refinement, testing or transition to operational use.DARPA