Yes there is a large and rapidly growing amount of scientific papers on laser therapy. There are more than 130 double-blind positive studies confirming the clinical effect of low level laser therapy (LLLT).
More than 3000 research reports are published.
In recent years some 250 papers have annually been published in peer reviewed scientific journals.
Since LLLT has a general effect, a wide range of treatments have been suggested, some well documented, some less documented and others anecdotal. (Source World Association of Laser Therapy)