高能量、纳秒脉冲光纤激光器在远距离传感、抽运光源和材料加工等领域具有广泛的应用。利用长腔结构的锁模光纤激光器是获得高脉冲能量、低重复频率激光脉冲的有效方法之一。石墨烯作为新型激光锁模器件,具有价格低廉、制备简单以及光谱响应范围宽等优点,成为脉冲激光器研究领域的热点之一。北京工业大学高功率光纤激光课题组构建了 High-energy, nanosecond-pulsed fiber lasers have a wide range of applications in areas such as remote sensing, pumping light sources and material processing. The use of a long-cavity mode-locked fiber laser is one of the effective methods to obtain high pulse energy and low repetition rate laser pulses. As a new type of laser mode-locked device, graphene has the advantages of low cost, simple preparation and wide spectral response range, and has become one of the hotspots in the field of pulsed lasers. Beijing University of Technology high-power fiber laser task force built