Cold Laser News

Information about Cold Laser Therapy Equipment and Quantum Healing Technologies.

Laser Wavelength and Therapeutic Window


The two most studied and used wavelength ranges are red laser and near Infrared Laser and offer a generous selection of therapeutic lasers that operate in the range of the most commonly proven wavelengths, which are used in the majority of the practitioner-grade products.

Many people are confused about finding and choosing the right wavelength. This article will help you to more confidently wade through the noise, hype and claims and make a more educated decision. The obscure 1064nm wavelength for example, falls in the NIR category at the far end of the Infrared Laser Spectrum. Even if there were an individual study that showed promising results for some condition,  I do not believe that it would produce superior results than the 780nm to 905nm wavelength range of lasers that are more commonly available. These are the ones that are most highly used and promoted for the simple reason that they work.

Although some manufacturers or researchers have made claims of effectiveness in certain situations for an obscure wavelength, doesn’t necessarily mean that other wavelengths would not produce similar or even better results.

The wavelength of the light significantly affects depth of penetration and it interacts with tissue in the body. Although there is no one right answer, the general consensus is as follows:

  • Using different wavelengths allows more flexibility in a treatment. Each wavelength can affect cells in a slightly different way. This provides the option for several different mechanisms to treat the same or multiple issues in a single client.
  • Infrared diodes in the 800nm range (780nm to 830nm) are best for deep tissue work because they are not quickly absorbed by hemoglobin or water.
  • Many higher-end and more expensive cold lasers and super pulsed lasers offer wavelengths in the 904nm and 905nm range, because they have proven results over many year of successful application.
  • Class IV lasers commonly use the 980nm wavelength. They share some therapeutic characteristics 780nm to 850nm lasers, however the bulk of the energy goes to creating thermal gradients in the H2O that increase circulation and blood flow. The increase in circulation allows the bodies natural healing process to accelerate. Consequently, the Class IV lasers have become quite popular for high-end pain control and some doctors prefer the 980nm system due to quicker treatment times and high level of pain control. Additionally, 980nm can also serve well in some cases for a surgical laser. The flipside to 980nm is that much of the energy converts into heating water in tissue, which is great for laser surgery but less productive for therapy.
  • Emitters in the 600nm to 660nm range are recommended for treating, inflammation, root nerve, acupuncture and trigger points. Red light lasers are great for soft tissues and small joints, with shallow penetration. They are useful as a guiding light when used in combination with infrared lasers.
  • The growing consensus in the cold laser industry is that multiple wavelengths are needed to most effectively treat the widest range of conditions. The type of healing needed will dictate to the laser user which wavelength is preferred. For example, Red lasers are great for soft tissue and offer the strongest anti-inflammatory effects, and Infrared Lasers deliver a significantly longer wavelength, typically down to the bone level and are preferred for hard tissue issues such as bones, tendons, ligaments, spine and large and small joints of the musculoskeletal system.
  • Fortunately, protocols that call for treatment of acupoints (acupuncture points) can be treated with nearly all of the therapeutic wavelength lasers because an acupoint is close to the surface of the skin as revealed by heat and skin resistance sensors. These points are revealed as a small explosion of heat beneath the skin. Anything you can do with a needle, you can do with a laser, just faster, easier, more effectively and completely painlessly.

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The ailments are listed in alphabetical order with suggested points and a reference of images and written descriptions of point location, depicting the precise body point for treating with  your cold laser. Below is an example of the image files that are presented with each condition. As you can see, the points are clearly shown so that anyone can find them. They also come with a description of how to find them with ease and precision. Also included are two BONUS Auricular therapy charts for easy treatment of many more issues.

Acupressure Analysis Computer Program

Cold Laser Power Level, Dosage, Protocols and Size of Treatment Area

In addition to wavelength, other factors that can be equally important to the effectiveness of cold lasers are power level, accuracy of the dosage, range of the protocols, and the size of the treatment area. Other factors to consider before purchasing a cold laser are the warranty period, build quality, device interface and of course, the overall safety of the product. In reality, it seems like all the cold lasers on the market have a unique value proposition (cost versus benefit) and they are all good at helping people with pain management and healing.

Therapy Laser Cellular Targets

The Therapeutic Window

So in some cases therapist are targeting the circulatory system so they use 660nm and 905nm but if you are treating deep damaged tissue like many structural problem, you want to push the energy as deep as possible. Below is a modified graph of the energy absorption by wavelength for hemoglobin HbO2 and Hb (per the University of Essex). Variations of this graph are used across the web. I have added in the absorption of light energy by H2O in purple. This graph show a low spot in the absorption of light where light can travel the greatest distance. This low spot is called the therapeutic window. There is a lot of literature emphasizing the therapeutic window and how it is used to predict the best wavelength for therapy lasers. Recent developments show that each wavelength has advantages but 800 to 860nm could be the best wavelength if you can only choose one because it has the best combination of depth of penetration (low absorption), cellular interaction and energy transfer efficiency.

Is There A Magic Wavelength?

No. Some manufacturers say one wavelength is the “magic” wavelength and other wavelengths, in the therapeutic window, are less effective for healing. If you study specifications for laser diodes, you will typically see that lower cost “810nm” diode can range from 800nm to 860nm when tested. For an additional cost, a diode manufacturer will pick and choose diodes from a larger run if you need a tight-tolerance higher-cost diode but most manufacturer do not do this. They purchase standard tolerance diodes so your 830nm laser could be actually operating at 800nm. If you check the specs on a 660 nm laser diodes like the ones used in medical lasers, you will find that the manufacturer specs the range from 635 nm to 670 nm. That means that a 660 nm laser might be 635 nm and vice versa.

Don’t be fooled by anyone who says that 660 nm is better than 635 nm or that 830nm is better than 810nm or any laser claiming they have a superior wavelength within the tolerance of a standard laser diode. They could easily be the exact same diode but the manufacturer is over-marketing a non-existent difference.

The actual output wavelength is also based on the temperature of the diode. The output change for a typical IR diode is 0.3nm/oC so the wavelength when you first turn a system on (20oC) will be 3 to 10 nanometers less than it would be at the full operating diode temperature (up to 40oC). This also shows that any manufacturer that is saying their system has a superior specific wavelength is probably over-marketing.

Emphasis on the higher frequency ranges (IR) and deeper penetrations are echoed by a majority of cold laser manufacturers. Although each manufacturer insists that their wavelength is optimal, there is no general consensus on the sweet spot. For some conditions the lower wavelength is best and sometimes a higher wavelength is best therefore, having a system that is capable of dual wavelengths gives you the most flexibility.


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The ultimate laser for practitioners who appreciate having a small, portable, pocket size laser that delivers more power, protocols and frequency combinations than 99% of all desktop cold lasers in both red and infrared wavelengths. The ultimate in fast and effective treatments.


  • 1400mW of power at 808 nanometer wavelength.
    This is the infrared wavelength for deep PAIN RELIEVING penetration to the bone. Compare with ML830, which uses three 33mW diodes = 100mW Total Power. LZ30-Z has 14 times the power of a 100mW laser. Like having 14 of the other brand lasers in the palm of your hand.
  • 1000mW of power at 637 nanometer wavelength.
    This is the red wavelength for superior anti-inflammatory effects and injury recovery of all soft tissue issues, nerves, gums, wounds, burns, shallow muscles. Compare with PL5000 Erch, which has four 5mW red laser diodes at 635 nanometer, which = 20mW of power.
    With AVANT LZ30-Z & LZ30-X Lasers you get both red and infrared laser wavelengths in the highest power ever offered. The dual wavelength digital system can work with your choice of simultaneously or individually, with a large selection of preset Hz frequency pulsed protocols. Super easy to use, and fits in your pocket! AMAZING!!!

AVANT LZ30-Z Professional Use Cold Laser System with Maximum Power 1400mW of Infrared laser, plus 1000mW of red laser.
DUAL WAVELENGTHS, can be used individually or together along with up to 500 preset frequency settings through the digital interface.

AVANT LZ30-X Professional Use Cold Laser System with Maximum Power 900mW of Infrared laser, plus 250mW of red laser.
DUAL WAVELENGTHS, can be used individually or together along with up to 500 preset frequency settings through the digital interface.

AVANT lasers include a generous 3-year top-to-bottom warranty and unlimited support plan.

READ MORE & See all AVANT LZ30 Laser Options

Call a Laser Specialist for support Toll Free 1-888-824-7558 or 808-572-2995



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