【摘要】 目的对四波混频的转换效率以及影响转换效率的各种因素进行理论分析。方法采用Stark啁啾快速绝热通道SCRAP(Stark chirp rapid adiabatic passage)技术和哈密顿方法。结果在Λ-型原子系统中实现了最大相干性,得到了三阶非线性极化率χ(3)与非线性效应转换系数的关系。结论在考虑强泵浦场的损耗下,适当选择激光参数和原子系统,可以使得弱的闲频场到四波混频场的能量转换效率超过100%。更多还原

【Abstract】 Aim To study the conversion efficiency of four-wave mixing and theoretically analyze all kinds of factor which would influence the conversion efficiency.Methods Using stark-chirped rapid adiabatic passage(SCRAP) technique and Hamiltonian approach.Results The maximum coherence is induced in Λ-type atomic systems,and the special relation between third-order nonlinear susceptibility χ(3) the nonlinear conversion coefficient is obtained.Conclusion When the pump field depletion is considered and the laser and atom parameters in proper are selected,the energy conversion efficiency is valuable to exceed 100%.更多还原