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The performance of a novel Ho:LuAG ceramic laser Q-switched by a polycrystalline Cr2+:ZnS saturable absorber

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Abstract

A novel Ho:LuAG ceramic laser Q-switched by a polycrystalline Cr2+:ZnS saturable absorber was reported for the first time in this paper. We took a diode-pumped Tm:YLF laser emitting at 1.9075 μm as the pump source. The laser operated in both continuous wave mode and passively Q-switching (PQS) mode. The maximum PQS output power of 2.67 W was obtained with a slope efficiency of 26.4%. When the absorbed pump power increased from 4.78 to 10.8 W, with three output couplers of T = 2%, T = 10% and T = 25%, the pulse widths decreased as the pump power increased, from 102.9 to 89.2 ns, from 147.1 to 127.6 ns, and from 173 to 150 ns, respectively, and the repetition frequency varied from 10.2 to 20.1 kHz, from 9.3 to 18.3 kHz, and from 8.45 to 16.66 kHz as well. The central wavelength remained constant 2100.64 nm with the change of output couplers and operation modes. Furthermore, the output laser had a beam quality factor M 2 of 1.1.

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Acknowledgements

This work is supported by National Natural Science Foundation of China (Nos. 61308009, 61405047, 50990301), 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

    Y. Zhang, B. Q. Yao, Z. Cui & H. Li

  2. Key Laboratory of Transparent and Opto-functional Advanced Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    J. Li, T. F. **e, C. Y. Li, H. M. Kou & Y. B. Pan

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  1. Y. Zhang
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  2. B. Q. Yao
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  4. J. Li
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  7. C. Y. Li
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  9. Y. B. Pan
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Correspondence to B. Q. Yao.

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Zhang, Y., Yao, B.Q., Cui, Z. et al. The performance of a novel Ho:LuAG ceramic laser Q-switched by a polycrystalline Cr2+:ZnS saturable absorber. Appl. Phys. B 123, 28 (2017). https://doi.org/10.1007/s00340-016-6590-x

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