Wideband optical saturable absorbers (SA) are an ideal laser component for pulse laser generation in different wavelengths, which has attracted tremendous attention in recent years. Herein, a MoO3-x-based novel wideband optical SA has been demonstrated by utilizing it for ∼1/1.5/2 μm Q-switched pulses generation. After separately integrating the MoO3-x-SA into Yb-, Er- and Tm-doped fiber lasers, passively Q-switched pulses with pulse durations of ∼1.5/2.2/1.6 μs, repetition rates of several tens kilohertz at corresponding wavelengths of ∼1038/1562.9/1910 nm are obtained. Our work firstly reveals the remarkable wideband optical saturable absorption of the MoO3-x, which strongly implies the potential application in infrared photonics devices. It may also provide new opportunities for wideband optical SA based on oxygen-deficient metal oxides.

中文翻译：

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MoO3-x 作为用于被动调 Q 掺镱、铒和铥光纤激光器的宽带光学可饱和吸收器

宽带光饱和吸收体（SA）是产生不同波长脉冲激光的理想激光元件，近年来引起了极大的关注。在此，基于 MoO3-x 的新型宽带光学 SA 已被证明，将其用于~1/1.5/2 μm Q 开关脉冲生成。将 MoO3-x-SA 分别集成到 Yb-、Er- 和 Tm 掺杂的光纤激光器中后，被动调Q 脉冲的脉冲持续时间为~1.5/2.2/1.6 μs，相应波长下的重复率为几十千赫兹~获得1038/1562.9/1910 nm。我们的工作首先揭示了 MoO3-x 显着的宽带光学饱和吸收，这强烈暗示了其在红外光子学器件中的潜在应用。它还可能为基于缺氧金属氧化物的宽带光学 SA 提供新的机会。