稠密V型介质中双色飞秒脉冲及频谱演化的RCEP调制  

RCEP Modulation on Evolution of Two-color Femtosecond Pulses and Spectrum in a Dense V-type Medium

作　　者：梁变[1] 贾克宁[1] 梁颖[1] 仝殿民[2] 樊锡君[1] 

机构地区：[1]山东师范大学物理与电子科学学院 [2]山东大学物理学院

出　　处：《计算物理》2011年第4期583-588,共6页Chinese Journal of Computational Physics

基　　金：国家973计划(No.2006CB806000);国家自然科学基金(No.10875072)资助项目

摘　　要：利用不含慢变振幅近似和旋波近似的全波Maxwell-Bloch方程组的数值解,研究单光子共振和失谐两种条件下,相对载波包络相位(RCEP)对在稠密V型三能级原子介质中传播的双色sech型飞秒超短脉冲及频谱演化的影响.结果表明,RCEP对双色脉冲的传播形式及频谱特性的调制在失谐情况比在单光子共振情况显著,在失谐条件下调节RCEP可获得比单光子共振条件下大得多的频谱展宽,出现了最高频率达到入射脉冲中心频率18倍的超连续谱.In one-photon resonance and detuning cases,effect of relative carrier-envelope phase（RCEP） on evolution of two-color sech-type femtosecond pulses and spectrum in a dense V-type three-level atomic medium is investigated with full Maxwell-Bloch equations.Modulation of RCEP on pulse shape and spectral property of two-color pulses in detuning case is more evident than that in single-photon resonance case.And in detuning case we get spectrum broadening much greater than that in resonance case.Supercontinuum with the highest frequency of 18 times of incident frequency appears.

关 键 词：稠密介质 双色超短脉冲 单光子共振 失谐 相对载波包络相位 

分 类 号：O437[机械工程—光学工程]