Will it be safe from l@ser attack?
The big issue will probably be eye safety of the maintenance folks.
Assuming the laser can operate at a relatively low power level and still produce results, and that the focal distance is also relatively short, then it should be a fairly safe item.
You could still mount it on the VS to keep it further from people. You could also power it down on the ground unless the aircraft knows it is in a takeoff mode. Ground test modes would then be where the hazard is.