Gain-switched watt-level thulium-doped fiber laser and amplifier operating at 1.7 μm
Gain-switched watt-level thulium-doped fiber laser and amplifier operating at 1.7 μm
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DOI：
10.1017/hpl.2022.33
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发表时间：
2022
影响因子：
4.8
通讯作者：
Haitao Guo
中科院分区：
文献类型：
--
作者：
Yang Xiao;Xusheng Xiao;Lutao Liu;Haitao Guo
Abstract. A 1.7 μm gain-switched thulium-doped all-fiber laser with a master oscillator power amplifier (MOPA) configuration, utilizing a bandpass fiber filter and a 1550 nm erbium/ytterbium-codoped fiber MOPA, is demonstrated. The influences of pump pulse parameters (repetition rate and pulse duration) and laser cavity structures (ring and linear) on the laser performances were experimentally investigated. To the best of our knowledge, the power quenching and drop were observed in the 1.7 μm gain-switched thulium-doped fiber lasers for the first time, resulting from the mode-locked-resembling operation and nonlinear effects. Moreover, the fiber ring-cavity laser was more stable than the linear-cavity laser in the time domain and power. Finally, a laser with a maximum average power of 1.687 W, a slope efficiency of 19.7%, a single-pulse energy of 16.87 μJ, a pulse width of 425 ns, a repetition rate of 100 kHz and a peak power of 39.69 W was obtained.
