根据宝钢高速运动薄钢板激光加工的实际需要,本项目研制出新型脉冲调Q N d:YA G激光打孔和打标两用激光加工系统所用的计算机操作系统,可以产生频率、幅值、脉冲宽度、脉冲组数等均可自由调整的控制脉冲信号,获得满足现场要求的打孔和...根据宝钢高速运动薄钢板激光加工的实际需要,本项目研制出新型脉冲调Q N d:YA G激光打孔和打标两用激光加工系统所用的计算机操作系统,可以产生频率、幅值、脉冲宽度、脉冲组数等均可自由调整的控制脉冲信号,获得满足现场要求的打孔和打标。展开更多
Cascaded nonlinearity based soliton pulse compression in the process of femtosecond difference frequency generation is studied theoretically. A set of simplified coupled wave equations under the conditions of large ph...Cascaded nonlinearity based soliton pulse compression in the process of femtosecond difference frequency generation is studied theoretically. A set of simplified coupled wave equations under the conditions of large phase mismatch and matched group velocities is obtained,which reveals the physical mechanism of soliton compression in this process. Numerical simulations demonstrate that in the presence of group velocity dispersion and equivalent cross phase modulation,both the pump and the signal pulses can be compressed with a high compression ratio.展开更多
基金the National Natural Science Foundation of China (Grant Nos.10776005,60725418)National Basic Research Program of China (Grant No.2007CB815104)
文摘Cascaded nonlinearity based soliton pulse compression in the process of femtosecond difference frequency generation is studied theoretically. A set of simplified coupled wave equations under the conditions of large phase mismatch and matched group velocities is obtained,which reveals the physical mechanism of soliton compression in this process. Numerical simulations demonstrate that in the presence of group velocity dispersion and equivalent cross phase modulation,both the pump and the signal pulses can be compressed with a high compression ratio.
