A picosecond laser operates on the principle of generating extremely short pulses of light, typically on the order of picoseconds (one trillionth of a second, or 10^-12 seconds). Here's a breakdown of its working principle:

• Mode-Locking: The key to generating such short pulses is a technique called mode-locking. In a mode-locked laser, multiple longitudinal modes of the laser cavity are phase-locked together, which results in the interference of these modes to produce a series of very short pulses. These pulses are spaced by the round-trip time of light within the laser cavity.
• Gain Medium: The laser uses a gain medium (such as a crystal, glass, or fiber) that is excited by a pump source (like a diode laser) to produce light through stimulated emission.
• Pulse Compression: In some systems, external pulse compression techniques are used to further shorten the pulses.

• Picosecond Duration: The duration of these pulses is in the picosecond range, which is achieved by precisely controlling the dispersion and nonlinear effects within the laser cavity. The short duration of the pulses allows for high peak power while maintaining low average power, minimizing heat accumulation in the material being processed.

• Intensity: Because the energy of the laser pulse is confined to such a short duration, the peak power (power per unit time) of a picosecond laser can be extremely high, even if the total energy of each pulse is relatively low.
• Nonlinear Effects: The high peak power enables the laser to induce nonlinear optical effects in materials, such as multi-photon absorption, which can be used for precise material processing or medical applications.

• Material Processing: The high peak power and short pulse duration allow for precise material ablation with minimal thermal damage to surrounding areas. This makes picosecond lasers ideal for micromachining, cutting, engraving, and surface texturing.
• Medical Treatments: In dermatology, picosecond lasers are used for tattoo removal and skin rejuvenation due to their ability to break down pigments and stimulate collagen production with minimal damage to surrounding tissues.
• Scientific Research: Picosecond lasers are also used in time-resolved spectroscopy and ultrafast phenomena studies, where precise control over pulse timing is essential.

• Wavelength: The output wavelength can be tuned depending on the gain medium and the optical components used in the laser cavity. Some systems allow for frequency doubling, tripling, or other nonlinear conversions to produce different wavelengths.
• Repetition Rate: The repetition rate, or how frequently pulses are emitted, can be controlled by adjusting the cavity length or using external modulators.

In summary, picosecond lasers rely on mode-locking techniques to generate extremely short pulses of light with high peak power. Their ability to deliver energy in such short bursts makes them valuable for applications requiring precision and minimal thermal effects.

• It is used in the removal of tattoos in any colors
• Treatment of benign moles
• Sun and age spots
• Treatment of melasma
• Hormonal stains (pregnancy, birth control pills, etc.)
• Treatment of hyperpigmentation
• Treatment of capillary vessels
• Skin resurfacing and rejuvenation
• Removal of acne scars

• Special design of adjustable spot size headpieces: For professional operators, no need to stop treatment and touch screen to adjust spot size, could adjust the headpiece to get suitable spot size.
• Variety of Wavelengths and handpieces Available: 1064nm (Dermal pigment lesions and dark color tattoo removal), 532nm (Epidermal pigment lesions, red, yellow, coffee tattoo removal), Honeycomb Handpiece (wrinkle removal and skin rejuvenation).
• High peak power: 1200-2000mj High single pulse energy means a strong ability to crush the pigment to make it the bane of full range of pigmentations.
• Aiming beam (635nm): For targeted and precise treatment.
• High-quality laser source: The USA imported a Q-switch and laser bar.
• Short pulse width: Efficient destruction of the target pigment with minimal collateral thermal damage meeting the criteria of selective photothermolysis.
• Flat-top hat Beam: Ensure that the energy is delivered efficiently to maximize effect while minimizing damage to surrounding tissue.
• 1-10mm adjustable spot size: Energy density is automatically adjusted with spot size.