【摘要】 采用基于遗传算法(Genetic algorithm)的自适应反馈系统,成功实现了二溴甲烷多个拉曼振动模式的选择激发.通过脉冲分析方法(二次谐波频率分辨光谱开关和二次谐波交叉频率分辨光谱开关)(SHG-FROG和SHG-XFROG),在时域和频域上对优化脉冲进行还原和分析,结果表明:空间光学调制器(SLM)将优化脉冲调制成具有负啾啁特性的脉冲串。该选择激发实验的成功实现验证了相干控制自适应系统在研究复杂分子系统方面具有良好的应用前景。更多还原

【Abstract】 With adaptive feedback system based on Genetic Algorithm(GA),selective excita- tion of coherent anti-Stokes Raman scattering for dibromomethane was successfully achieved. The optimal pulses were characterized with second harmonic generation frequency-resolved optical gating(SHG-FROG)and displayed as trains of sub-pulses with negative chirp.This experimental demonstration of selective excitation between neighboring levels indicates that coherent control has a great potential in the improvement of sensitivity and is a meaningful method in the complex molecular system.更多还原