为了实现红外飞秒脉冲的整形及调控, 采用4f系统相位控制技术, 实验搭建了脉冲整形装置, 并利用整形脉冲对铷原子体系中激发双重态间的相干布居转移进行操控。结果表明, 控制抽运脉冲的附加相位, 可实现双重态中上激发态的饱和布居, 通过修改附加相位函数可将上、下激发态的布居数反转。整形脉冲同样适用于其它的原子和分子系统的相干布居转移的操控。

In order to achieve the shaping and control of infrared femtosecond pulse, 4f system phase control technology was used and pulse shaping device was set up by experiment. By using pulse shaping, coherent of population transfer of the excited double states in the rubidium atoms system was controlled. The results show that saturation population can be realized in excited double state by controlling the additional phase of pumping pulse. Population of the upper and lower excited state can be reversed by modifying the function of additional phase. Coherent control of population transfer by pulse shaping can also be applied in other atom and molecular systems.