Pico laser wavelength refers to the specific light wavelengths used in picosecond lasers, most commonly 532nm, 755nm, and 1064nm, to target different skin concerns. The 532nm treats red and brown pigment near the surface, 755nm targets melanin for pigmentation and tattoos, while 1064nm penetrates deeper for dermal pigment and darker skin types.
What is a Pico Laser Wavelength?
A pico laser wavelength is the specific color of light spectrum used by a picosecond laser to treat skin imperfections. Unlike traditional aesthetic lasers, a pico laser fires light energy in ultra-fast bursts—lasting just one-trillionth of a second.
This speed creates a mechanical pressure wave that breaks up unwanted pigment without generating excessive heat, protecting the surrounding skin. Different wavelengths penetrate to different depths to treat specific skin conditions.
The Three Main Pico Laser Wavelengths
532 nm Wavelength
Target Layer: Superficial (surface layer of the skin).
Primary Uses: Clearing surface sun spots, freckles, and removing bright red, orange, or yellow tattoo inks.
755 nm Wavelength
Target Layer: Mid-dermal layer.
Primary Uses: Treating stubborn brown spots, melasma, and fading green or blue tattoo inks. It is highly absorbed by melanin, making it effective for targeting isolated brown spots on light-to-medium skin tones.
1064 nm Wavelength
Target Layer: Deep dermal layer.
Primary Uses: Removing black and dark blue tattoo inks, remodeling acne scars, and smoothing fine lines. Because this wavelength penetrates deeply and bypasses the surface pigment, it is the safest option for dark skin tones.
Laser Wavelength Quick Reference
| Wavelength | Penetration Depth | Best For | Safe For Dark Skin? |
| 532 nm | Shallow (Surface) | Red/Yellow ink, sun spots | Use with caution |
| 755 nm | Medium | Green/Blue ink, freckles, melasma | Medium skin tones |
| 1064 nm | Deep | Black ink, acne scars, wrinkles | Yes (Safest option) |
Common Clinical Questions
Which wavelength works best for acne scars?
The 1064 nm wavelength is most effective for acne scars. When used with a specialized fractional lens, it passes through the top layer of skin to create tiny zones of pressure in the deeper dermis. This triggers the body’s natural healing response, generating new collagen and elastin to smooth out indented scars.
Why is the 1064 nm wavelength safest for dark skin?
Shorter wavelengths (like 532 nm) are easily absorbed by the natural melanin in darker skin, which can cause accidental burns or changes in skin color. The 1064 nm wavelength has a lower absorption rate in surface melanin, allowing it to safely bypass the surface layer and target deeper pigments.
How is the correct wavelength chosen for tattoo removal?
Wavelength selection depends entirely on the color of the tattoo ink, as different colors absorb different light spectrums:
Black and dark blue inks: Treated with 1064 nm.
Green and light blue inks: Treated with 755 nm.
Red, orange, and yellow inks: Treated with 532 nm.
