Room-temperature lasing at 2.1-µm has been demonstrated in Ho:Lu3Al5O12 with a slope efficiency of 82% and a threshold energy of 4.4 mJ. A maximum absorbed energy of 17 mJ yielded 10 mJ of laser output energy. To simulate diode-pumping experiments, a tunable Co:MgF2 laser operating at 1.878 µm was used to achieve lasing on 5I7 → 5I8 transitions.
© 1996 Optical Society of America
David W. Hart, Mahendra Jani, and Norman P. Barnes, "Room-temperature lasing of end-pumped Ho:Lu3Al5O12," Opt. Lett. 21, 728-730 (1996)