You should do some reading on LLLT. The avg devices out there are a scam.
There are some studies out there for other wave lenghts. Blue light for example increases NO which is beneficial for hair, instead you could also just get a nitoglycerin creme, which would do the same more effectively.
You could try googling on which wave lenghts have been researched for hair and then make a custom laser helm yourself.
This however, is going to be unrelated to wounding. I dont think LLLT would related to wounding much.
If you got money you should try to get a crth2/gpr44 inhibitor like setipiprant because it has been shown that is inhibits neogenesis of the hair follicle
http://www.sciencedirect.com/science/article/pii/S0022202X15361753