We have investigated high-peak- and high-average-power operation of diode-pumped, thulium-sensitized, holmium 2.1-μm lasers. Free-running laser powers of 14 W at 29 Hz have been demonstrated with 2.6% electrical efficiency. Q-switched operation produced average powers in excess of 11 W in a burst of short pulses. Preliminary optical parametric oscillator frequency conversion of the holmium laser to 4 μm is also reported.
© 1993 Optical Society of America
Original Manuscript: April 13, 1993
Published: October 15, 1993
S. R. Bowman, G. J. Quarles, Kevin J. Riley, J. G. Lynn, S. K. Searles, B. J. Feldman, J. McMahon, W. Whitney, and D. Epp, "High-average-power operation of a Q-switched diode-pumped holmium laser," Opt. Lett. 18, 1724-1726 (1993)