Chen Lijuan, Li Xin, Zhang Haikun, Xia Wei
Appl Opt. 2018 Dec 10;57(35):10239-10242. doi: 10.1364/AO.57.010239.
In this paper, the novel two-dimensional (2D) tungsten ditelluride (WTe) was successfully fabricated by the liquid phase exfoliation method and used as a saturable absorber (SA) for a diode-end-pumped passive Q-switching Tm:YAP laser operating at the 2.0 μm wavelength band. The saturable fluence and the modulation depth of the prepared WTe SA were determined to be 5.1 μJ/cm and 7.2%, respectively. The maximum average output power of 0.64 W was obtained with the shortest pulse width of 368 ns at a pulse repetition rate of 78 kHz. The corresponding highest single pulse energy and largest pulse peak power were calculated to be 4.8 μJ and 12.7 W, respectively. To the best of our knowledge, this is the first time that WTe has been used as the SA for 2.0 μm solid-state bulk lasers. The results indicate that WTe should be an excellent SA for generating 2.0 μm pulsed lasers.
在本文中，通过液相剥离法成功制备了新型二维（2D）二碲化钨（WTe），并将其用作二极管端面抽运的被动调Q 2.0μm波段Tm:YAP激光器的可饱和吸收体（SA）。所制备的WTe可饱和吸收体的可饱和通量和调制深度分别确定为5.1μJ/cm²和7.2%。在78kHz的脉冲重复频率下，获得了0.64W的最大平均输出功率，最短脉冲宽度为368ns。计算得出相应的最高单脉冲能量和最大脉冲峰值功率分别为4.8μJ和12.7W。据我们所知，这是首次将WTe用作2.0μm固态体激光器的可饱和吸收体。结果表明，WTe应该是产生2.0μm脉冲激光器的优秀可饱和吸收体。
