The Er:YAG laser produced 2940nm laser which has peak value of absorption to water, then it can be well-absorbed by water. The absorption coefficient is 10 times of CO2 laser.
So Er:YAG laser can dispel thinner tissue than CO2 laser, it can only penetrate the skin moist a few microns in depth, their skin in a time of relaxation 1-5ms, the extent of the damage stranded heat also very light, not vaporization of the organization of the solidification of a thin layer, bleeding only needle size.
The new fractional 2940nm laser that represents a new option to perform skin resurfacing on aged and photo-damaged skin: it is a safe and effective treatment with little patient downtime and discomfort, no analgesia and no gel or consumables required.