参量过程中的带间脉冲流

PULSE FLUX GENERATION IN PARAMETRIC PROCESS

用数值方法在非线性周期介质中研究参量和频过程 .频率处于周期介质布拉格频率附近的入射信号光 ,将不会像在线性周期介质中那样被完全反射 .当信号光和抽运光强度相近时 ,它们与和频光通过非线性相互作用下 ,将会形成周期性脉冲流 ,共振地以高透射率穿过非线性周期介质 .在一定条件下 ,系统会丧失这种周期性而走向混沌 .

We use numerical method to study the parametric sum\|frequency generation process in nonlinear periodic dielectric. When the frequency of the incident light lies around the Bragg frequency of the periodic dielectric, it will not be completely reflected as in the linear case. The information light interacts with the pump light and sum\|frequency light via nonlinear interaction to form periodic pulse flux, and transmits through the nonlinear periodic structure resonantly. Under certain conditions, the system will lose its periodicity and enter choatic states.