The combination of 1550 nm and 1927 nm wavelengths is significant in biomedical applications, particularly in laser lipolysis (fat reduction) and dermatology.
1. 1550 nm Wavelength
Commonly used in fractional non-ablative lasers (e.g., Fraxel).
Targets water in tissues, stimulating collagen production for skin resurfacing.
Penetrates mid-dermis, useful for wrinkles, scars, and skin tightening.
2. 1927 nm Wavelength
Strongly absorbed by water (more than 1550 nm) but with shallower penetration.
Used for superficial skin treatments (pigmentation, sun damage).
Less thermal damage compared to CO₂ (10,600 nm) or Er:YAG (2940 nm).
Combined Use (1550 nm + 1927 nm)
1550 nm heats deeper layers (collagen remodeling).
1927 nm treats superficial pigmentation & fine lines.
Example Systems:
Solta Medical’s Fraxel Dual (combines 1550 & 1927 nm for fractional resurfacing).
Lutronic’s LaseMD (1927 nm for pigmentation, sometimes paired with 1550 nm).
Bilens' BL-K20 1550nm & 1927nm skin resurfacing
Key Applications
Skin Rejuvenation (wrinkles, acne scars).
Pigmentation Disorders (melasma, sun spots).
Laser Lipolysis (fat reduction via water absorption).
| Wavelength (nm) | Target Chromophore | Depth | Primary Use |
|---|---|---|---|
| 1550 | Water | Mid-dermis | Collagen remodeling |
| 1927 | Water | Superficial | Pigmentation |
| 10600 (CO₂) | Water | Deep | Ablative resurfacing |
| 2940 (Er:YAG) | Water | Very superficial | Precision ablation |
Conclusion
The 1550 nm + 1927 nm combination offers a balanced approach for fractional laser treatments, addressing both deep collagen stimulation and superficial skin concerns with minimal downtime.
Would you like details on specific devices or clinical studies?
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