Photobiomodulation (PBM) uses specific wavelengths of light to interact with biological tissues and support cellular processes such as energy production, circulation, and inflammation modulation.
Two commonly discussed near-infrared (NIR) wavelengths in PBM are 810nm and 1070nm. While both fall within the therapeutic optical window, they differ in tissue penetration characteristics, scattering behavior, and research focus.
Many people ask whether 1070nm is “better” than 810nm. The answer depends on the intended application.
1. Tissue Penetration and Light Scattering
One of the primary differences between 810nm and 1070nm is penetration depth.
1070nm
Falls within the 900–1100nm optical window associated with deeper transmission
Exhibits lower scattering in tissue compared to shorter wavelengths
May allow greater energy delivery to deeper structures
For neurological applications, penetration depth is particularly relevant, as light must pass through scalp and skull before reaching cortical tissue.
810nm
Also penetrates effectively
Extensively studied in PBM research
Slightly higher tissue scattering relative to longer wavelengths
Both wavelengths can reach brain tissue under appropriate conditions, but 1070nm may offer deeper transmission depending on device design and protocol.
2. Mitochondrial Interaction and ATP Production
Photobiomodulation is commonly associated with stimulation of mitochondrial processes, including activation of cytochrome c oxidase (CCO) and increased ATP production.
810nm has been widely studied for CCO interaction
Research indicates biological activity across the broader NIR spectrum, including 1064–1070nm
Some in vivo studies suggest that wavelengths in the 1000nm range may support mitochondrial redox metabolism and oxygenation, though mechanisms may vary depending on tissue type and dosage.
Wavelength effectiveness depends on multiple variables, including:
Irradiance
Energy density
Treatment duration
Device configuration
3. Cognitive and Neurological Research
Research involving 1064nm–1070nm transcranial photobiomodulation has explored potential effects on:
Working memory
Executive function
Attention
Brain oxygenation
For example, human studies using 1064nm have reported measurable changes in cognitive task performance under controlled conditions.
Animal studies have also examined memory-related outcomes with near-infrared wavelengths in this range.
Importantly, outcomes vary depending on protocol, dosage, and population studied.
4. Safety and Application Considerations
Both 810nm and 1070nm wavelengths are used in PBM and are generally considered safe when applied appropriately.
Potential practical distinctions include:
810nm → widely researched, broad clinical literature
1070nm → deeper transmission characteristics, growing neurological research
Rather than one being universally superior, wavelength selection depends on:
Target tissue depth
Intended outcome
Engineering design
Energy delivery parameters
Summary: 810nm vs 1070nm
Both wavelengths fall within the therapeutic near-infrared window used in photobiomodulation.
810nm is extensively studied and widely used
1070nm may offer deeper tissue transmission with growing research in neurological applications
The most appropriate wavelength depends on context, design, and intended use.
