[Chemist_Geek]

The question is energy density - time on target will be a problem. If the laser beam is powerful enough, then a very brief illumination of the target by the laser will be enough to damage it. Otherwise, the beam will have to be held on target, and that will be non-trivial.

[Frank_Discussion]

Based on B-Chan's comment above, staying on target may not be that difficult. Tie the flight controls into the turret targeting controls, you should be able to draw a bead and keep it there.

Beyond that, just lazing the enemy's sensor suite might be a good thing to be able to do.

[_Jim]

Otherwise, the beam will have to be held on target, and that will be non-trivial.

A closed-loop optical-sighting system involving the use of the laser itself is out of the realm of possibilities?

Couple a 'laser' to a micromachined "DMD device" (active steerable reflector) controlled in real-time and you're dang near there ...