Dermal rejuvenation: non-ablative laser procedures

Laser systems with wavelengths in the range of 511 to 1,410 nm can be used in four pulse duration modes:

• Q-switch mode – pulse duration is measured in the nanosecond range;
• short-pulse mode – pulse duration from 1 to 1000 μs (0.001-1 ms);
• long-pulse mode – duration from 1 to 500 ms;
• constant radiation mode – constant contact of the laser beam and tissue.

There are significant differences between diode and pulsed solid-state lasers (e.g., differences in peak power and tissue contact time between diode and pulsed solid-state lasers). The peak energy of solid-state lasers is thousands of times greater than that of diode lasers.

The contact time between the laser beam and the tissue is hundreds of times shorter than the pause between pulses. This leads to heat removal from the target tissue and avoids burns. High peak energy allows for effective destruction of the target tissue. For each type of laser, its own application technologies have been developed taking into account these features.

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