In the field of medical aesthetics, especially for applications such as pigment and spot removal, high-energy lasers are often required for treatment. Common high-energy lasers include CO₂ lasers and Nd:YAG lasers. Today, we will focus on Nd:YAG lasers.

Using Nd:YAG lasers for targeted treatment relies on the principle of photoacoustic effects, where laser energy shatters pigment particles in the skin, allowing the body’s immune system to naturally expel them. This method requires high pulse energy and narrow pulse width. The commonly used narrow-pulse lasers in this field are nanosecond Q-switched lasers and picosecond lasers. The difference in pulse width between the two directly affects peak power, which in turn influences treatment efficacy and patient experience.

Q-switched lasers are relatively simple in principle. They use a Q-switch to compress laser pulses, and their energy originates from the self-excited oscillation of a xenon flashlamp or further amplification, with pulse widths typically in the nanosecond range. Picosecond lasers, on the other hand, are more complex, requiring a seed source, xenon flashlamp, and protective components. Their principle involves traveling wave amplification, balancing output pulse energy and seed source safety.

In the field of medical aesthetics, the quality of the output laser beam is also a crucial parameter, which is closely related to the seed source. Without a high-performance seed source, the effectiveness of subsequent amplification efforts is significantly reduced.

As a professional domestic manufacturer specializing in microchip lasers, RealLight has extensive expertise in the field of passively Q-switched picosecond laser seed sources. Our MCD series low-repetition-rate microchip lasers serve as excellent choices for picosecond seed sources. They offer a maximum pulse energy of 300 μJ, Gaussian beam output with a beam roundness of over 90%, which reduces the burden on subsequent amplification stages and ensures a well-defined beam profile at the initial stage. Pulse widths are available in 350 ps or 500 ps, with an option for 500 ps/2000 ps dual-pulse-width output, providing greater flexibility for downstream applications.

500 ps Typical Pulse Waveform

2000 ps Typical Pulse Waveform

Typical Beam Profile

MCD Series Microchip Picosecond Seed Source

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