We report a high-average-power laser-diode-pumped Nd:YAG master oscillator power amplifier system that has a minimum number of elements in the single multipass zigzag-slab amplifier stage and is used to pump a high-peak-power and high-average-power Ti:sapphire laser system. This phase-conjugated system produces an average power of 362 W at 1 kHz in a 30-ns pulse with an optical-to-optical conversion efficiency of 14%. With an external KTP doubler this system generates 132 W of green average output power at 1 kHz with a conversion efficiency of 60% when pumped at a power level of 222 W. To the best of our knowledge these results represent the highest average output power at both infrared and green wavelengths achieved in a single amplifier stage.
© 2003 Optical Society of America
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.7300) Lasers and laser optics : Visible lasers
Hiromitsu Kiriyama, Koichi Yamakawa, Toru Nagai, Nobuto Kageyama, Hirofumi Miyajima, Hirofumi Kan, Hidetsugu Yoshida, and Masahiro Nakatsuka, "360-W average power operation with a single-stage diode-pumped Nd:YAG amplifier at a 1- kHz repetition rate," Opt. Lett. 28, 1671-1673 (2003)