摘要
研究了电磁感应透明条件下五能级M型原子体系中探测光脉冲的非线性传播。当探测光脉冲的脉宽较大时,其色散效应可忽略,脉冲内具有不同偏振方向和不同边带的4个分量可发生四波混频,相互交换能量;当探测光脉冲的脉宽较短时,必须考虑其色散效应,4个分量可形成一种全新的四分量超慢光孤子。产生这种四分量超慢光孤子的输入功率为微瓦量级,远低于光纤中产生矢量光孤子所需的能量。
The nonlinear propagation of a probe pulse in a M-type five-level atomic system is investigated under the condition of electromagnetically induced transparency.As for a long probe pulse,its dispersion effect can be neglected,and the four-wave mixing process and the energy exchange can occur among the four components within the probe pulse with different polarization directions and different side-bands.In contrast,as for a short probe pulse,the dispersion effect must be considered,and a novel kind of four-component ultraslow optical soliton occurs among these four components.In addition,the input power for the generation of such soliton is at micro-watt level,which is much lower than that needed for the generation of the vector solitons in fibers.
作者
王苗
杭超
Wang Miao;Hang Chao(State Key Laboratory of Precision Spectroscopy,East China Normal University Shanghai 200062,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第10期278-287,共10页
Acta Optica Sinica
基金
国家自然科学基金(11475063)
关键词
非线性光学
偏振
四波混频
光孤子
nonlinear optics
polarization
four-wave mixing
optical soliton
