No Furball, latest tech has relatively low output lasers detonating mortar rounds in a few seconds. In addition to that, there's been some other tracking tech public demo that can indeed track mortar rounds.
Put the two together and you have an effective mortar defense out in the boonies... I think the tracker video had it frying two or three shells fired in a row. I think both videos were linked to on the forum, but I can dig it up if you're interested. I'm pretty sure the former was, and IIRC it was called fibre laser, or something about the laser beam not being completely coherent or something.
Edit- Looks like the tracker tech is in ghi's link.