稠密V型介质中双色飞秒脉冲及频谱演化的RCEP调制

计算物理 ›› 2011, Vol. 28 ›› Issue (4): 583-588.

稠密V型介质中双色飞秒脉冲及频谱演化的RCEP调制

梁变¹, 贾克宁¹, 梁颖¹, 仝殿民², 樊锡君¹

1. 山东师范大学物理与电子科学学院, 山东济南 250014;
2. 山东大学物理学院, 山东济南 250100

收稿日期:2010-08-06 修回日期:2010-12-07 出版日期:2011-07-25 发布日期:2011-07-25
通讯作者: 樊锡君,E-mail:xjfan108@yahoo.com.cn
作者简介:梁变(1985-),女,山东郓城,硕士生,从事激光与物质相互作用的研究,
基金资助:
国家973计划(No.2006CB806000);国家自然科学基金(No.10875072)资助项目

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

LIANG Bian¹, JIA Kening¹, LIANG Ying¹, TONG Dianmin², FAN Xijun¹

1. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
2. School of Physics, Shandong University, Jinan 250100, China

Received:2010-08-06 Revised:2010-12-07 Online:2011-07-25 Published:2011-07-25

摘要/Abstract

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.

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

Abstract: 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.

Key words: dense medium, tow-color supershort pulse, single-photon resonance, detuning, relative carrier-envelope phase

中图分类号:

O437

梁变, 贾克宁, 梁颖, 仝殿民, 樊锡君. 稠密V型介质中双色飞秒脉冲及频谱演化的RCEP调制[J]. 计算物理, 2011, 28(4): 583-588.

LIANG Bian, JIA Kening, LIANG Ying, TONG Dianmin, FAN Xijun. RCEP Modulation on Evolution of Two-color Femtosecond Pulses and Spectrum in a Dense V-type Medium[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2011, 28(4): 583-588.