It refers to a pulse of light emitted by a pulse-operated laser. Simply put, it is like the work of a flashlight. Keeping the button on means continuous work. When the switch is closed and then turned off immediately, a “light pulse” is sent. Laser pulses can be extremely short, such as the “picosecond” level, which means that the pulse time is on the order of picoseconds.
1 second = 103 milliseconds
1 millisecond = 103 microseconds
1 microsecond = 103 nanoseconds
1 nanosecond = 103 picoseconds.
1 second = 1012 picoseconds.
What are the benefits of shorter laser pulse times?
According to the famous “selective photothermolysis principle” proposed by American scholars in 1983, the shorter the laser action time, the less likely the laser energy absorbed and accumulated in the target tissue will diffuse to the surrounding tissue, and the energy is limited by the degree. In the target tissue that needs to be treated, the surrounding normal tissue is protected, so the selectivity of the treatment is stronger. In addition to breaking down pigment particles more effectively (spots, acne marks, tattoos), it also stimulates deep collagen regeneration (fine wrinkles, acne pits). And best of all, it’s non-invasive.
The pulse width of the picosecond laser is only one percent of that of the traditional Q-switched nanosecond laser. Under this ultra-short pulse width, the light energy has no time to convert into heat energy, and almost no photothermal effect is generated. After being absorbed by the target, its volume expands rapidly , produce photomechanical effect and be torn into pieces by blasting, with stronger selectivity, which can make pigmented skin lesions produce stronger curative effect under shorter treatment times. In one sentence, “picosecond laser crushes pigment particles more thoroughly, while causing less damage to surrounding tissues.”
As an analogy, if we compare the original pigment particles to rocks, the traditional Q-switched laser can crush these rocks into pebbles, and after using the picosecond laser, they can be crushed into fine sand, so that the pigments The debris absorption efficiency is greatly improved.
What are the advantages of picosecond lasers over traditional Q-switched lasers?
Stronger selectivity – the shorter the action time of the laser, the less likely it is for the laser energy absorbed and accumulated in the target tissue to diffuse to the surrounding tissue, and the energy is limited to the target to be treated to the greatest extent, protecting the surrounding normal tissue , so that the treatment selectivity is stronger.
Stronger curative effect – the pulse width of the picosecond laser is only one percent of that of the traditional Q-switched nanosecond laser, and the light energy is too late to be converted into heat energy, so there is almost no photothermal effect, and its volume expands rapidly after being absorbed by the target. The photomechanical effect is blasted and torn into pieces, so that the pigmented skin lesions can produce stronger curative effect under shorter treatment times.
Reduced chance of pigmentation – If pigment particles are compared to rocks, traditional lasers can crush rocks to the size of pebbles, while picosecond lasers can crush them into dust. At the same time, the chances of immediate hyperpigmentation are greatly reduced because of less heat damage.
The effect of a single treatment is obvious, and the recovery period of the injury is short – the redness and swelling can basically subside within 12-24 hours after the operation; the scope of application is wide, and one treatment can improve various facial problems at the same time. Nearly zero damage, there is no troublesome scabbing or scabbing after surgery, and the recovery is very fast, suitable for people with a fast-paced life.
Post time: Jan-16-2023
