The Output Characteristics of Double-End-Pumped Ho:LuAG
Laser at Room Temperature¹

Y. J. Shen, B. Q. Yao*, X. M. Duan, Y. L. Ju, and Y. Z. Wang

National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 15001, China

*e-mail: yaobq08@hit.edu.cn

Received December 3, 2011; in final form, December 5, 2011; published online April 3, 2012

Abstract—Continuous-wave (CW) and Q-switched operation of a room-temperature Ho:LuAG laser was res-
onantly double-end-pumped by a diode-pumped Tm:YLF laser at 1.91 m. The CW Ho: LuAG laser generated
24.5 W of linearly output at 2094.4 nm with beam quality factor of M² = 1.11 0.02 for an absorbed pump
power of 44.0 W, corresponding to optical-to-optical conversion efficiency of 55.7% and slope efficiency of
60.5%. Under Q-switched operation, a maximum output power of 24.1 W with a slope efficiency of 58.1% at
12 kHz was obtained. Also, the minimum pulse width of 32 ns was achieved, corresponding to the peak power
was 37.7 kW.

DOI: 10.1134/S1054660X12050234

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