Narrow Pulse Width Green Laser Based on LED-Pumped Electro-Optically Q-Switched Nd:YAG Laser

Abstract

In this study, we demonstrate an intracavity frequency-doubled 532-nm laser with a high peak power and narrow pulse width based on an LED-pumped electro-optically (E-O) Q-switched Nd:YAG laser. In the Q-switched operation mode, a maximum output of 4.35 mJ pulse energy at 1064 nm was obtained at a repetition rate of 200 Hz with a duration of 88 ns and a peak power of 50 kW. By optimizing the incidence angle of the KTP crystal to satisfy the noncritical phase-matching condition, the output pulse energy for the green laser at 532 nm was 1.55 mJ at a repetition rate of 200 Hz with a duration of 46 ns and a peak power of 33.7 kW by intracavity frequency doubling. To the best of our knowledge, this is the first demonstration of LED-pumped E-O Q-switched 1064- and 532-nm lasers reported to date.