Open AccessHigh-pulse-energy passively Q-switched sub-nanosecond MOPA laser system operating at kHz level
Author(s) -
Yiyin Zhou,
Xudong Li,
Haobo Xu,
Renpeng Yan,
Yugang Jiang,
Rongwei Fan,
Deying Chen
Publication year - 2021
Publication title -
optics express
Language(s) - Danish
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.425586
Subject(s) - materials science , optics , q switching , laser , nanosecond , amplifier , pulse repetition frequency , pulse (music) , birefringence , solid state laser , pulse width modulation , pulse duration , optoelectronics , power (physics) , physics , telecommunications , radar , cmos , quantum mechanics , detector , computer science
A passively Q-switched sub-nanosecond master oscillator power amplifier (MOPA) laser system at 1064 nm has been reported in this paper. The master oscillator was a passively Q-switched YAG/Nd:YAG/Cr 4+ :YAG microchip laser, yielding a pulse energy of 0.14 mJ and a pulse width of ∼490 ps at repetition rates of 500 Hz and 1 kHz. After passing a double-pass side-pumped Nd:YAG amplification system, the pulse energy reached 7.6 mJ and 1.7 mJ at 500 Hz and 1 kHz, respectively. The spatial beam deformation caused by the thermally induced birefringence was investigated numerically and experimentally.