Self-Q-switched and wavelength-tunable tungsten disulfide-based passively Q-switched Er:Y2O3 ceramic lasers
We report on diode-pumped Er:Y2O3 ceramic lasers at about 2.7 μm in the tunable continuous-wave, self-Q-switching and tungsten disulfide (WS2)-based passively Q-switching regimes. For stable self-Q-switched operation, the maximum output power reaches 106.6 mW under an absorbed power of 2.71 W. The shortest pulse width is measured to be about 1.39 μs at a repetition rate of 26.7 kHz at maximum output. Using a spin-coated WS2 as a saturable absorber, a passively Q-switched Er:Y2O3 ceramic laser is also realized with a maximum average output power of 233.5 mW (for the first time, to the best of our knowledge). The shortest pulse width decreases to 0.72 μs at a corresponding repetition rate of 29.4 kHz, which leads to a pulse energy of 7.92 μJ and a peak power of 11.0 W. By inserting an undoped YAG thin plate as a Fabry–Perot etalon, for the passive Q switching, wavelength tunings are also demonstrated at around 2710, 2717, 2727, and 2740 nm.
基金项目：National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61575164, 61575088, 11674269, 61475129); National Key Research and Development Program of China (2016YFB1102202); Natural Science Foundation of Fujian Province10.13039/501100003392 of China (2018J01108); Principal Fund of Xiamen University (20720180082).
Jiawei Wang：Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Yuzhao Zhang：Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Bin Xu：Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Zhengqian Luo：Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Huiying Xu：Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Zhiping Cai：Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Xiaodong Xu：Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, Chinae-mail: email@example.com
Jian Zhang：Key Laboratory of Transparent Opto-functional Inorganic Materials, Chinese Academy of Sciences, Shanghai 201899, China
Jun Xu：School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai 200092, China
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Xiaofeng Guan, Jiawei Wang, Yuzhao Zhang, Bin Xu, Zhengqian Luo, Huiying Xu, Zhiping Cai, Xiaodong Xu, Jian Zhang, and Jun Xu, "Self-Q-switched and wavelength-tunable tungsten disulfide-based passively Q-switched Er:Y2O3 ceramic lasers," Photonics Research 6(9), 830-836 (2018)