Photonics Research, 2018, 6 (9): 09000830, Published Online: Aug. 1, 2018
Self-Q-switched and wavelength-tunable tungsten disulfide-based passively Q-switched Er:Y2O3 ceramic lasers
Abstract
We report on diode-pumped Er : Y 2 O 3 ceramic lasers at about 2.7 μm in the tunable continuous-wave, self-Q -switching and tungsten disulfide (WS 2 )-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 WS 2 as a saturable absorber, a passively Q -switched Er : Y 2 O 3 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.
Xiaofeng Guan, Jiawei Wang, Yuzhao Zhang, Bin Xu, Zhengqian Luo, Huiying Xu, Zhiping Cai, Xiaodong Xu, Jian Zhang, Jun Xu. Self-Q-switched and wavelength-tunable tungsten disulfide-based passively Q-switched Er:Y2O3 ceramic lasers[J]. Photonics Research, 2018, 6(9): 09000830.