Volume 18, Number 12, 1501-1504, DOI: 10.1134/S1054660X08120165

Holmium laser in-band pumped by a thulium laser in the same host of YAlO3

B. Q. Yao, L. L. Zheng, R. L. Zhou, X. M. Duan, Y. J. Zhang, Y. L. Ju, Y. Z. Wang, G. J. Zhao and Q. Dong

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Abstract

We report on the room-temperature continuous-wave (CW) operation of a Ho:YAlO3 laser that is resonantly end pumped at 1.94 μm by a diode-pumped thulium-doped laser in the same host. Through the use of a 1 at % Ho3+-doped 20-mm-long YAlO3 crystal (b cut), the Ho:YAlO3 laser generated 1 W of linearly polarized (E//c) output at 2118 nm and 0.55 W of E//a output at 2128.5 nm for an incident pump power of 5 W, with an output coupler transmission of 14 and 3%, respectively. An optical-to-optical conversion efficiency of 20% and a slope efficiency of 33% were achieved at 2118 nm corresponding to an incident pump power.

PACS numbers  42.55.Xi - 42.60.Pk

Original Text © Astro, Ltd., 2008.

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