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用线性化近似方法计算了噪声间关联程度λ受时间周期调制下单模激光系统的光强关联时间T,结果表明,无论λ=0,λ>0或λ<0,T随量子噪声强度D和抽运噪声强度Q的变化均呈单调增长且最终趋于饱和(T=1),只是当λ<0时T随Q的变化曲线出现一极小值(存在抑制现象);当λ=0时,T不随时间周期调制频率Ωλ变化,当λ>0和λ<0,Ωλ取值小时T-Ωλ曲线出现高频振荡,随着Ωλ值增大振荡频率变低,振幅变小,最后趋于与λ=0的T值一致。
The correlation degree of noise λ was calculated by the linear approximation method. The correlation time T of the light intensity of the single-mode laser system under the time-period modulation was calculated. The results show that with the λ = 0, λ> 0 or λ <0, T depends on the quantum noise intensity D And the change of pumping noise intensity Q both monotonically increase and eventually become saturated (T = 1), except that when T <0, T has a minimum value with the change of Q (there is a suppression phenomenon); when λ = 0 , T does not vary with the time-period modulation frequency Ωλ. When λ> 0 and λ <0, the high-frequency oscillation appears on the T-Ωλ curve when the value of Ωλ is small. As the value of Ωλ increases, the oscillation frequency becomes lower and the amplitude decreases. Consistent with the T value of λ = 0.