基于弱光非线性频率上转换的脉冲调制方法研究

Based on the weak light frequency upconversion model, in this paper we investigated the conversion efficiency diversification depending on the intensity of the pump laser pulse with Gaussian profile. The curves of the weak light conversion efficiency and conversion photon ratios according to different pump pulse intensity were calculated, which could be concluded that as the pulse intensity increasing the conversion efficiency showed a periodically oscillation and the conversion photon number ratio increases with the increase of the light intensity, and finally tend flatten. This result will benefit the researches of the weak light nonlinear interaction processes under pulsed pump scheme, and especially be meaningful for investigating some new quantum manipulation mechanisms of the single-photon frequency upconversion system.