低重频高峰值功率亚纳秒掺镱光纤激光器

Low-Repetition High-Peak-Power Sub-Nanosecond Pulsed Yb-Doped Fiber Laser

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。

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.