Laser frequencies are classically associated with DR Nogier of Lyons, who discovered
the potential of treating embryonic tissue through laser acupuncture. The auricle, and associated body parts, respond best to typical frequencies to endodermal, ectodermal and mesodermal tissue. These are fascial components in the body based on different origins and genetics that shape the body style, personality kind, etc early in the embryo.
My Laser book has a chapter on laser frequencies, which are exact.