V型原子介质中周期量级脉冲激光传输特性对载波包络相位的依赖性

通过求解Maxwell—Bloeh方程，研究了稠密的V型三能级原子介质中，载波包络相位（CEP）Ф对周期量级脉冲激光的传榆特性及频谱特性的影响。结果表明：对于大面积的脉冲，周期量级激光脉冲的载波和相应的光谱对CEP具有很强的敏感性。CEP的大小可以影响脉冲振幅大小、传播速度快慢及脉冲的分裂。另外，其它条件一定CEP不同时，由于相干效应的不同，脉冲频谱受到CEP的影响，但不足以引起高频成分的显著变化。当Ф=0时，可得到频谱更宽、连续性更好的超连续谱。

Effects of Carrier--envelope Phase on Few--cycle Ultrashort Laser Pulses Propagation in V--type Medium

By solving the full Maxwell--Bloch equations, the effects of the carrier--envelope phase （CEP）on pulse propaga- ting and spectra characteristics of few--cycle ultra short laser pulses in a dense V type three--level atomic medium are investigated. The results show that the carrier propagation and spectrum evolution of the pulse are sensitive to its CEP and the phase sensitivity is more obvious for larger area pulse. The CEP can affect the amplitude, propagating velocity and pulse splitting case. Moreover, under the same condition, the pulse spectra are affected by the initial carrier--envelope phases due to the different coherence effect, which don＇t induce obvious changes of higher spectral components. When, the super continuum with wider spectral range and better continuity of high frequency components can be obtained.