522 nm single-longitudinal-mode high-frequency Pr3+:YLF laser based on pre-lase Q-switching technology

Abstract

In this work, based on the pre-lase Q-swiching technology, a single-longitudinal-mode (SLM) pulsed laser that can be emitted directly into the green spectral region at 522 nm is demonstrated for the first time. The rate equation of 522 nm Pr3+:YLF SLM Q-switched laser is established, and the output characteristics of the laser are obtained by simulation. The peak power of 37.9 W was obtained under an incident pump power of 12 W at 444 nm. At a repetition frequency of 20 kHz, the laser pulse energy and the pulse width were measured to be 3.05 μJ and 80.5 ns, respectively. The corresponding spectral linewidth is approximately 22 MHz.