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High-power passively Q-switched Nd:KGW laser pumped at 877 nm

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Abstract

In this work, we demonstrate, for the first time, a high-power passively Q-switched Ng-cut Nd3+:KGd(WO4)2/Cr4+:YAG laser pumped at 877 nm. The maximum average output power of ~1.6 W is obtained at the pump power of 5.22 W, when a saturable absorber with 98 % of initial transmission is used. The corresponding pulse energy is up to 16 µJ. The maximum pulse energy of 25.3 µJ is achieved at a repetition rate of 59 kHz, by employing a saturable absorber with 95 % of initial transmission. The corresponding pulse width and average output power are 89.0 ns and 1.5 W, respectively. A careful cavity design and a good thermal management ensure nearly TEM00 output with M 2 ≤ 1.22 within the whole range of operation in both N p and N m directions at 877 nm pump.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (61205136 CN) and the Innovation Program of Academy of Opto-Electronics (AOE), Chinese Academy of Science (CAS) (Y30B16A13Y).

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Authors and Affiliations

  1. Academy of Opto-electronics, Chinese Academy of Sciences, Beijing, 100094, China

    K. Huang, W. Q. Ge, T. Z. Zhao, J. Yu, J. G. He, H. Xiao & Z. W. Fan

  2. CHTM, The University of New Mexico, Albuquerque, NM, 87106, USA

    C. Y. Feng

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  1. K. Huang
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  2. W. Q. Ge
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  3. T. Z. Zhao
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Correspondence to W. Q. Ge.

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Huang, K., Ge, W.Q., Zhao, T.Z. et al. High-power passively Q-switched Nd:KGW laser pumped at 877 nm. Appl. Phys. B 122, 171 (2016). https://doi.org/10.1007/s00340-016-6439-3

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