What is a picosecond laser? from skeily's blog
What is a picosecond laser?
The Q Switch laser machine only does one thing, one thing. They produce a beam of light (in the form of particles called photons) that have the same wavelength (same color) and travel in the same direction. These allow the laser to make incredible things. For example, we can reflect lasers from barcodes and read barcodes, which are millions of times a day in grocery stores around the world. We can use laser cutting to make materials for the factory. We can reflect the exact distance of the moon by reflecting the laser from the moon. We can use lasers in medicine to treat diseases and make us more attractive.
The amount of power in the laser beam is based on the number of photons in the beam. More photons mean more energy. Fewer photons are not that powerful.
Now think about these photons propagating together in the beam. The time it takes for the first photon to pass the pointer to the last photon is called the pulse width and is measured in time. It's like a bunch of cars driving along the highway. The time from the first car to the point on the road to the last car is like the pulse width. For cars, it is measured in seconds or minutes. The measured value of the laser is one thousandth, one millionth or even one billionth of a second. Last year, the first picosecond laser was used to remove tattoos. It takes ten years to develop such a laser.
What is picosecond?
The picosecond is one trillionth of a second. I find this number difficult to understand, so the table below may give you a better understanding of what this means. Based on the speed of light, this watch is the fastest thing in the world. The speed of light is 186,282 miles per second. In a second, the light will travel around the earth for 7.5 seconds (7.5) times. The light will travel from the earth to the moon in 1.3 seconds.
So let's look at the distance the light travels at different time intervals.
As you can see from the table, the picosecond is so short that light, the fastest thing in the universe, can only move at the tip of a super fine nib. The picosecond is an incredibly short time.
Why is Picosecond revolutionary?
When the pulse width is long enough (the distance from the first photon to the last photon), the energy is absorbed slowly enough to heat the target, and we use this heat to destroy cells, such as hair follicles, or heavy collagen. In almost all cases, Q Switch ND YAG Laser Machine are used to generate heat. It is this heat that creates a wound and causes pain through treatment.
The picoseconds are different. The pulse width is very short and all photons in the beam hit the target almost exactly at the same time. Although not very close, photons in the beam will arrive together for all practical purposes. Photons arrive very fast, and heating effects do not produce shock waves in the target. We can create this shock wave without having to use that much power, which can reduce discomfort and any reaction (downtime).
When the target is a tattoo granule, it breaks down the tattoo ink into smaller particles that allow the body to remove the ink. The shock wave generated by Picosecond is very effective, and it can remove tattoos in 3 to 4 treatments when a conventional laser requires 12 to 15 treatments or more.
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