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Diode-pumped high-efficiency passively Q-switched Yb:CaYAlO4 laser

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Abstract

We experimentally demonstrated a high-efficiency passively Q-switched Yb:CaYAlO4 (Yb:CYA) laser based on a semiconductor-saturable absorber mirror (SESAM), and the output characteristics of the laser including the average output power, repetition frequency, pulse duration, pulse energy and pulse peak power were investigated by adopting output mirrors with different transmittances. When the transmittance of the output mirror was 5% and the pump power was set at about 7.76 W, a maximum average output power of as high as 2.480 W was achieved with a slope efficiency and light-to-light efficiency of the Q-switched Yb:CYA laser of up to 37.1% and 31.2%, respectively.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grant nos. 61475127, 61575163, 61805205, 61875167 and 61775184, the China Postdoctoral Science Foundation under Grant no. 2018M633303, the Fundamental Research Funds for the Central Universities under Grant no. XDJK2018C079, and the Doctor Fund from Southwest University under Grant no. SWU110645.

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Correspondence to Zheng-Mao Wu.

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Gao, ZY., Xia, GQ., Tang, R. et al. Diode-pumped high-efficiency passively Q-switched Yb:CaYAlO4 laser. Opt Rev 25, 729–733 (2018). https://doi.org/10.1007/s10043-018-0469-5

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