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中文摘要：
介绍了重频为400KHz，脉冲宽度为960ps输出的高脉冲能量的亚纳秒掺镱光纤激光器。该激光器采用全光纤主振荡功率放大（MOPA）结构，种子源使用的是实验室自制的频率为400kHz，脉宽为940ps，输出功率为100mw的掺镱光纤激光器，通过6个10W多模激光抽运将种子光放大到8．9W平均功率输出，相应的单脉冲能量达到22μJ，峰值功率达到23kW，输出激光中心波长为1064．5nm。该亚纳秒、高能量脉冲激光器可广泛用于材料加工，激光测距，激光雷达等领域。
英文摘要：
In this article, we report an efficient sub-nanosecond pulses generation in Yb-doped fiber laser with 400 kHz repetition rate and 960 ps pulse width, which adopts master oscillator fiber power amplifier （MOPA） configuration, extracting 8.9 W average output power up to 23 kW with central wavelength of 1064.5 nm. The seed laser with 100 mW average output power is amplified to 8.9 W by one-stage Yb-doped double-cladding fiber amplifier, pumped by 6 multimode laser diodes with maximum output power of 10 W. This kind of high-energy sub-nanosecond Yb-doped fiber laser can be widely used in material processing, laser radar, laser ranging and other fields.
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