论文部分内容阅读
高峰值功率、高稳定性以及优越光束质量的激光光源是材料加工与处理的理想选择。利用重复频率为120 k Hz、脉宽为220 ps、平均功率为26μW的种子光源,经过光纤和固体组成的混合放大系统,最终得到平均功率为39.2 W的激光输出,峰值功率达到1.5 MW。预放大器由两级光纤放大器组成,功率放大器为四级端面抽运的Nd:YVO4固体放大器,通过控制晶体掺杂浓度、晶体温度以及抽运光束直径,并且调节各个放大级中的填充因子,最终得到输出光束的光束质量因子为M2=1.3。
Laser light sources with high peak power, high stability and superior beam quality are ideal for material processing and handling. Using a seed light source with a repetition rate of 120 k Hz, a pulse width of 220 ps and an average power of 26 μW, a hybrid amplification system consisting of fiber and solid was used to obtain a laser output with an average power of 39.2 W and a peak power of 1.5 MW. The pre-amplifier consists of two stages of fiber amplifiers, and the power amplifier is a four-stage end-pumped Nd: YVO4 solid amplifier. By controlling the crystal doping concentration, crystal temperature and pumping beam diameter, and adjusting the fill factor in each amplification stage, The beam quality factor of the output beam is M2 = 1.3.