自发辐射介入的多光子过程增强非线性信号的产生

Efficient Enhancement of Nonlinear-Optical Signal by Spontaneous-Emission-mediated Emissive Multiphoton Progress

自发辐射介入的多光子过程可以有效增强级联系统的非线性信号的产生:1)在相等参数的条件下,级联系统产生的最大非线性信号大约是满足相干布居捕获条件下的Λ系统产生的最大非线性信号的两倍.2)在一定范围内,级联系统通过控制泵浦场与原子跃迁频率的失谐量大小可以有效获得非线性信号增强,这从实验上放宽了激光场与原子共振的条件,易于实验操作.

This paper rcvcals that spontaneous- cmission- mediated emissive nluhiphoton progress can efficiently enhance nonlinear-optical signal in the cascade systeln： I ） under the same parameters,the strongest nonlinear -optical signal takes place in thc cascade system nearly double than it in the A system at coherent- population -trapping;2）within a certain range,the punlp- atoms detuning controlled in the cascade system,we can get an increase in the generated nonlincar- optical signal efficiently,which is relaxed restrictions on the resonance between pump fields and atoms,and it is easy to operate.