A defective molybdenum oxide (MoO3−x) prepared by a hydrothermal and defect engineering approach was spin-coated on the quartz glass and implemented as saturable absorber (SA). The experiment evidenced that MoO3−x based SA can function as an efficient nanosecond pulse generator, servicing Nd3+, Er3+, Tm3+ doped lasers emission at 1.06 1.64 and 1.94 µm. And the shortest pulse duration of 396 ns, 275 ns, and 1.4 μs was achieved on this wavelength with the corresponding maximum peak power of 14.37 W, 33.76 W and 7.94 W. In our study were also observed the optical modulation characteristics as well as the output performance of the passive Q-switch lasers modulated by MoO3−x SA, which indicates that the modulation depths are 6.5%, 7.6% and 5.8%, respectively, while the average output powers 0.79 W, 1.13 W and 1.6 W. The results confirm that the few-layered MoO3−x nanosheets can be a promising candidate for pulse laser generation in wide spectral bands, and they exhibit a great stability in an atmospheric environment and high laser damage threshold, which are beneficial to realizing high power laser output.

中文翻译：

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有缺陷的氧化钼用作纳秒脉冲发生器的饱和吸收器，为 1.06、1.64 和 1.94 μm 的 Nd3+、Er3+、Tm3+ 掺杂激光发射提供服务

通过水热和缺陷工程方法制备的有缺陷的氧化钼 (MoO3-x) 被旋涂在石英玻璃上并用作可饱和吸收剂 (SA)。实验证明，基于 MoO3-x 的 SA 可以用作高效的纳秒脉冲发生器，为 Nd3+、Er3+、Tm3+ 掺杂激光发射提供 1.06、1.64 和 1.94 µm 的服务。并且在该波长上实现了 396 ns、275 ns 和 1.4 μs 的最短脉冲持续时间，相应的最大峰值功率为 14.37 W、33.76 W 和 7.94 W。在我们的研究中还观察了光调制特性以及MoO3−x SA调制的无源调Q激光器的输出性能，表明调制深度分别为6.5%、7.6%和5.8%，而平均输出功率为0.79 W、1.13 W和1.6 W。