Diode-pumped single-frequency Tm:YAG NPRO laser by using different pumping spot sizes

Abstract

This paper presents the experimental results of the monolithic Tm:YAG nonplanar ring oscillator (NPRO) pumped by two kinds of laser diodes with different pumping spot sizes. By longitudinal pumping in continuous-wave operation, a single-frequency output power of 404 mW was obtained at room temperature, with a slope efficiency of 48.2%. The influences of the pumping spot sizes on the beam properties were also discussed.

Keywords

nonplanar ring oscillator (NPRO) / Tm:YAG laser / laser diode / pumping spot size

References

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant No. 60478046) and Sino-German Collaboration funded by German Research Foundation (DFG) and NSFC.

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg