Abstract
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.
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