High-Power and Efficiency Continuous-Wave Operation
of a-Cut Ho:YAP 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 November 20, 2011; in final form, November 20, 2011; published online March 6, 2012

Abstract—We report the continuous-wave (CW) operation of a room-temperature a-cut Ho:YAP laser reso-
nantly end-pumped by a diode-pumped Tm:YLF laser at 1.91 m. A maximum CW output power of 14.6 W at
2118.7 nm for a-oriented Ho:YAP was obtained, corresponding to the slope efficiency of 69.35% and optical-
to-optical conversion efficiency of 63.04% with respect to absorbed pump power. The laser operated at a single
mode (TEM₀₀) with the beam quality factor of M² ~ 1.51.

DOI: 10.1134/S1054660X12040196

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