We propose a highly efficient quasi-cw Nd:YAG rod laser with a novel side-pumping design that uses microlens-free diode stacks. We demonstrate 320-W output power with 28% electrical-to-optical efficiency, which is, to our knowledge, the highest efficiency reported for diode-pumped solid-state lasers.
© 2001 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
(140.5560) Lasers and laser optics : Pumping
Shuichi Fujikawa, Keisuke Furuta, and Koji Yasui, "28% electrical-efficiency operation of a diode-side-pumped Nd:YAG rod laser," Opt. Lett. 26, 602-604 (2001)