A high-average-power conduction-cooled diode-pumped Nd:YLF rod laser has been developed. A new conduction-cooled side-pumping scheme with a solid prismatic pump-light confinement cavity was employed. A transparent, high-thermal-conductivity MgF><sub>2</sub> prism was used as a highly efficient pump cavity as well as a low-thermal-resistance heat spreader. The pumping efficiency and thermal resistance of the cavity were 85% and 0.20 °C°W, respectively. When this scheme was combined with heat pipes for heat removal, a maximum average output power of 72 W was demonstrated, with an optical slope efficiency as high as 49%.
© 2000 Optical Society of America
Y. Hirano, T. Yanagisawa, S. Ueno, T. Tajime, O. Uchino, T. Nagai, and C. Nagasawa, "All-solid-state high-power conduction-cooled Nd:YLF rod laser," Opt. Lett. 25, 1168-1170 (2000)