开放的V型双色泵浦系统频率上转换区域的非线性效应

Nonlinear Effect of an Open V-type Two-color Pumping System in the Frequency Up-conversion Regime

给出了开放的 V型双色泵浦无粒子数反转激光系统精确的定态非线性解析解 ,利用从这个解析解得到的数值计算结果分析了在频率上转换区域非线性对系统增益、色散、能级粒子数差和泵浦场泵浦速率阈值的影响 。

We give an exact nonlinear analytical solution of the steady state in an open V-type noninversion lasing system pumped by the two-color fields, discuss the conditions of producing lasing without inversion in the limit cases of the strong driving field, and analyze the effect of nonlinearities on the gain, dispersion, population differences between levels and pumping rate threshold of the pumping field in the frequency up-conversion regime by the numerical calculation results from the nonlinear analytical solution. Finally the stability of the steady state of the system is discussed.