We demonstrate a passively multi-wavelength Q-switched Ytterbium-doped fiber laser (YDFL) based on a multi-wall carbon nanotubes embedded in polyethylene oxide film as saturable absorber. The YDFL generates a stable multi-wavelength with spacing of 1.9 nm as the 980 nm pump power is fixed within 62. 4 mW and 78.0 mW. The repetition rate of the laser is tunable from 10.41 to 29.04 kHz by increasing the pump power from the threshold power of 62.4 mW to 78 mW. At 78 mW pump power, the maximum pulse energy of 38 nJ and the shortest pulse width of 8.87 µs are obtained.

中文翻译：

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多波长碳纳米管的多波长调Q掺Y光纤激光器

我们展示了一种基于多壁碳纳米管的无源多波长调Q掺Y光纤激光器（YDFL），该碳纳米管嵌入在聚环氧乙烷薄膜中作为可饱和吸收剂。由于980 nm的泵浦功率固定在62. 4 mW和78.0 mW之内，因此YDFL产生的稳定多波长间隔为1.9 nm。通过将泵浦功率从62.4 mW的阈值功率提高到78 mW，可以将激光器的重复频率从10.41 kHz调节到29.04 kHz。泵浦功率为78 mW时，最大脉冲能量为38 nJ，最短脉冲宽度为8.87 µs。