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Passively Q-switched Ho:LuAG laser with near-diffraction-limited beam quality

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Abstract

A passively Q-switched Ho:LuAG laser resonantly pumped by a 1.91-μm laser was presented. A comparison analysis of laser performances with two different output couplers was carried out. Using Cr2+:ZnS as the saturable absorber, the maximum average output power of 1.14 W was obtained at 2,076.56 nm. The pulse duration was kept constant while increasing the pump power. Meanwhile, the pulse energy is linearly dependent on pump power. The shortest pulse duration of ~36 ns and highest pulse energy of 1.54 mJ were obtained at output coupler transmittance of 25 and 30 %, corresponding to the pulse repetition rate of 554 and 790 Hz, respectively. The beam quality factor of M 2 was 1.05, which is the near diffraction limited.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (No. 61308009, No. 61405047), China Postdoctoral Science Foundation funded project (No. 2013M540288), Fundamental Research funds for the Central Universities (Grant No. HIT. NSRIF. 2014044, Grant No. HIT. NSRIF. 2015042) and Science Fund for Outstanding Youths of Heilongjiang Province (JQ201310).

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Authors and Affiliations

  1. National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, 150001, China

    B. Q. Yao, Z. Cui, X. M. Duan, Y. Z. Yang, Y. Q. Du, J. H. Yuan & Y. J. Shen

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  1. B. Q. Yao
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  2. Z. Cui
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  3. X. M. Duan
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  4. Y. Z. Yang
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  5. Y. Q. Du
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  6. J. H. Yuan
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  7. Y. J. Shen
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Correspondence to X. M. Duan.

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Yao, B.Q., Cui, Z., Duan, X.M. et al. Passively Q-switched Ho:LuAG laser with near-diffraction-limited beam quality. Appl. Phys. B 118, 235–239 (2015). https://doi.org/10.1007/s00340-014-5976-x

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  • DOI: https://doi.org/10.1007/s00340-014-5976-x

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