Open Access100 Hz operation in 10 PW/sr·cm2 class Nd:YAG Micro-MOPA
Author(s) -
Taisuke Kawasaki,
Vincent Yahia,
Takunori Taira
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.019555
Subject(s) - optics , amplifier , materials science , brightness , aperture (computer memory) , laser , beam (structure) , optoelectronics , physics , cmos , acoustics
An Nd:YAG Micro-MOPA, based on a microchip master oscillator and power amplifier system with gain aperture beam cleaning, could generate sub-ns 200 mJ pulses with extremely high brightness of 18 PW/sr·cm 2 [Opt. Express268609 (2018)]. However, the system repetition rate was limited to 10 Hz, due to thermal problems occurring in the main amplifier rod under high-power operation. In this work, we achieved 100 Hz operation with pulse brightness of 11 PW/sr·cm 2 by optical compensation of thermal lensing, which was evaluated through calculations and an experiment.