单模激光系统中信噪比对净增益的随机共振

Stochastic Resonance of the Signal-to-noise Ration Versus the Net Gain in a Single-model Laser System

研究了受信号调制的色泵噪声和实虚部间关联的量子噪声驱动的单模激光系统的随机共振现象 ,发现信噪比随激光系统净增益系数存在随机共振 当泵噪声自关联时间和调制信号频率增加时 ,信噪比随激光系统净增益系数的变化曲线经历了从同时出现共振和抑制到单调上升的演化过程 ;当调制信号振幅、泵噪声强度和量子噪声强度、量子噪声实虚部间关联系数等变化时 ,该曲线一直同时出现共振和抑制 。

The phenomenon of stochastic resonance is studied in a single-mode laser system driven by the colored pump noise with signal modulation and the quantum noise with cross-correlation between the real and imaginary parts,and which is found in the signal-to-noise ratio R versus net gain a_0 curve. Moreover,when pump noise self-correlation time τ and frequency Ω of signal increase,the curve of R～a_0 will experience a change process from simultaneous existence of resonances and suppressions to monotonous rise. When the amplitude B of signal,the pump noise intensity P and quantum noise intensity Q,and the cross-correlation coefficient between the real and imaginary parts of the quantum noise λ_q all change,the curve of R～a_0 will always simultaneous appear resonances and suppressions,but the resonance-peak and suppressions-valley will take place great change.