U.S. Developing 100-Kilowatt Laser for Strike Fighters
I would think this would be dificult for several reasons:
1. the fighter plane will not remain stationary in the air while it fires the laser beam
2. it's not a continuous beam
3. the people on the ground shouldn't have the accuracy that a fighter plane with targeting equipment does
In all likelyhood, reflecting the beam back is a very slim probability, most certainly until ground troops get man-mounted, extremely accurate targeting systems. Which I don't think they have now nor do I think they will have for a while. Especially since one small movement places your point of aim onto a point in space much farther from where it was before, without the stability of the plane, a human couldn't reflect that beam back very well.