A Diode-Pumped Tunable Single Frequency Tm:YAG Laser at
Room Temperature Using Two Etalons¹

L. Wang, C. Q. Gao*, M. W. Gao, Y. Zheng, Y. S. Zhang, and R. Wang

School of Opto-Electronics, Beijing Institute of Technology, Beijing 100081, China

*e-mail: gao@bit.edu.cn

Received September 4, 2011; in final form, September 9, 2011; published online December 28, 2011

Abstract—We report a diode pumped single frequency Tm:YAG laser with two coated fused silica etalons as
mode selectors. The maximum single frequency output power was 681 mW with the pumping power of 4.83W.
The slope efficiency of single-frequency laser was 20.5% and the optical-to-optical conversion efficiency was
14.2%. According to the experimental results, we developed a prototype with the maximum single frequency
output power of 249 mW and the slope efficiency of 23.1%. The frequency tuning was investigated by changing
the temperature of the crystal. A tuning coefficient of 2.57 GHz/C was obtained. The beam propagation factors
M² were measured as 1.01 in both directions. The linewidth of the single frequency was 40 kHz.

10.1134/S1054660X12020181

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