Laser treatment for peripheral vascular disease is very new and is only done in selected centres. In answer to your question "do I know anything about it" the answer is NO.
Google Laser Atherectony for information.
In you father's case. I would guess that he has an abdominal aortic aneurysm and of course a bypass aorto-femoral graft would be desirable....BUT the femoral part ( blood vessels of the leg) is crap......which means the operation would be a waste of time.
I suppose if Laser Atherectomy could improve the blood vessels in his leg, then they possibly could give the aorto-femoral graft a shot.........but it "don't look too good"