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Dual-loss-modulated passively Q-switched Tm:LuAG laser with multi-walled carbon nanotube and monolayer graphene

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Abstract

By simultaneously using a multi-walled carbon nanotube (MWCNT) and a monolayer graphene saturable absorber (SA) in the cavity, a laser-diode-pumped dual-loss-modulated passively Q-switched Tm:LuAG laser at 2 μm is demonstrated for the first time. In comparison with the singly passively Q-switched laser with MWCNT or monolayer graphene SA, the doubly passively Q-switched laser with both MWCNT and monolayer graphene SA can generate shorter pulse width and higher peak power. A maximum pulse width compression ratio of 2.8 and a highest peak power enhancement factor of 4 were obtained at the incident pump power of 5.8 W, respectively. The experimental results show that the dual-loss modulation is an efficient method to compress the pulse widths and improve the peak powers of the Q-switched lasers at 2 μm.

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Acknowledgments

The authors acknowledge the financial assistances provided by National Natural Science Foundation of China (61475088, 61378022, 61308020, 61205145), Independent Innovation Foundation of Shandong University, IIFSDU (2013HW013) and the Open Foundation of State Key laboratory of Crystal Material of Shandong University (KF1403).

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Authors and Affiliations

  1. School of Information Science and Engineering, Shandong University, Jinan, 250100, China

    C. Luan, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li & W. C. Qiao

  2. State Key Laboratory of Crystal Material, Shandong University, Jinan, 250100, China

    K. J. Yang

  3. Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Beijing, China

    L. H. Zheng, J. Xu, Q. G. Wang, X. D. Xu & L. B. Su

  4. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, 710119, China

    Y. G. Wang

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  1. C. Luan
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  2. K. J. Yang
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  11. Q. G. Wang
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  14. Y. G. Wang
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Correspondence to S. Z. Zhao.

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Luan, C., Yang, K.J., Zhao, J. et al. Dual-loss-modulated passively Q-switched Tm:LuAG laser with multi-walled carbon nanotube and monolayer graphene. Appl. Phys. B 120, 759–763 (2015). https://doi.org/10.1007/s00340-015-6193-y

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