Share this article on :

Starts or metrics


Multimedia Article

The AESTHETICS 2020; 1(1): 50-56

Published online April 30, 2020

© Korean Association For Laser Dernatology And Trichology

Development of Picosecond Laser for Dermatology Application: Its Changeable Pulse Width and Bundle Pulse Implementation

Won J. Yi , PhD

CTO, R&D division, Jeisys Medical, Gwangmyeong, Korea

Correspondence to: Won J. Yi
CTO, R&D division, Jeisys Medical, Gwangmyeong 14241, Korea

Received: March 18, 2020; Revised: April 2, 2020; Accepted: April 10, 2020

This is an open access article distributed under the terms of the Creative Commons Attribution Non- Commercial License ( which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Jei-Pico laser, originally developed by Jeisys Medical in Korea, uses a new electro-optics technology beyond the existing SBS and Microchip laser. The characteristic feature of Jei-Pico is the variable pulse width from 180 ps to 2000 ps. Another function of Jei-Pico laser is that it’s capable of 15 bundle pulses in one pumping cycle. Jei-Pico is capable of pulse combination that can change the pulse width of each of the 15 bundle pulses. The seed laser has been made with electro-optics technology that has a gain factor of ~9.0 × 109 through three optical amplifiers. The development of Jei-Pico is focused on Nd:YAG rod with 1064 and 532 nm. Maybe this technology can be applied to 532 nm as a pumping source to the Ti:Sapphire or alexandrite rod to produce the 700 nm~ wavelength. Jei-Pico has about 600 MW for 1064 nm and 220 MW for 532 nm.

Supplementary video file: This article contains supplementary material (It is available at

Keywords: Electro-optics, Pulse-width, Bundle pulse, Gain factor, Optical amplifier, Picosecond laser, nanosecond laser