Is Laser Wavelength Important?
In one word, YES! Wavelength is critical to the success of your intended clinical application. Therapeutic lasers require deeper penetration to stimulate various tissue layers to promote optimal healing. Infrared wavelengths penetrate deeper by the laws of physics and science. Visible red lasers do not. Lets learn more.
The wavelength of light is measured in billionths of a meter, or nanometers (nm). The shorter the wavelength, the greater the energy carries. As wavelength becomes longer, the energy carried is less. Some wavelengths work better than others. Wavelength is the prime determinant of tissue penetration.
The wavelength is very specific for cell absorption. In the IR (Infrared) spectrum, the longer wavelengths penetrate deeper and a greater percentage of the laser light will be transmitted in a forward direction. This means less scatter and better results!
Laser therapy wavelengths vary from 630nm up to 1100nm depending on the manufacturer and your desired effect. The wavelength chosen for therapeutic laser must be capable of reaching its intended target. Skin is permeable to light between 600nm and 1300nm. This is referred to as an ‘optical window”, and most light therapy is between these wavelengths.The wavelengths most commonly used for therapeutic purposes are 633 nm (HeNe lasers), 635 nm, 650 nm, 660 nm, 670nm (InGaAIP lasers), 780 nm, 820 nm, 830 nm (GaAIAs lasers), 904nm (GaAs lasers),
Lasers that do not penetrate as deeply (630 - 740nm) are suitable for acupuncture point stimulation and wound healing but have not proven their clinical efficacy with deep musculoskeletal conditions. Infrared lasers (750 - 1500nm) penetrate deeper tissues and stimulate trigger points, ligaments, joint capsules, and intra-articular structures
In my experience, Gallium-Aluminum-Arsinide (GaAlAs) lasers are effective over a wide therapeutic range and have very good depth of penetration. Laser treatment at more than one wavelength is likely to enhance results. Combining multiple wavelengths during the same session, one is likely to trigger additional biochemical/energetic pathways and a total higher dosage can be given. CLINICAL PEARL:Ask your laser manufacturer what the wavelengths are and if the laser has multiple wavelengths from the same optical fiber. Very important to determine if you will need to purchase multiple wands and fibers. (Multiple wands can be EXPENSIVE)
Dr. Perry Nickelston, DC
VP Practice Development K-LaserUSA
Director of the Pain Laser Center, LLC in Ramsey, NJ
1-866-595-7749 Ext. #102
Discussion Area - Leave a Comment