摘要
We report on diode-pumped Er:Y_2O_3 ceramic lasers at about 2.7 μm in the tunable continuous-wave, selfQ-switching and tungsten disulfide(WS2)-based passively Q-switching regimes. For stable self-Q-switched operation, the maximum output power reaches 106.6 m W 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:Y_2O_3 ceramic laser is also realized with a maximum average output power of 233.5 m W(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.
We report on diode-pumped Er:Y2O3 ceramic lasers at about 2.7 Itm in the tunable continuous-wave, sdf- Q-switching and tungsten disulfide (WS2)-based passively Q-switching regimes. For stable stir-Q-switched oper- ation, 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 Its 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 Its at a corresponding repetition rate of 29.4 kHz, which leads to a pulse energy of 7.92 ItJ 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. 2018 Chinese Laser Press
基金
National Natural Science Foundation of China(NSFC)(61575164,61575088,11674269,61475129)
National Key Research and Development Program of China(2016YFB1102202)
Natural Science Foundation of Fujian Province of China(2018J01108)
Principal Fund of Xiamen University(20720180082)