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.
出处
《计算物理》
EI
CSCD
北大核心
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
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
dense medium
tow-color supershort pulse
single-photon resonance
detuning
relative carrier-envelope phase
