加性噪声对激光一级相变类比的影响

Effects of Additive Noise on First-Order-Like Phase Transition in a Laser System

从单模激光场的增益噪声模型出发 ,导出了激光场定态强度分布函数 ,研究了定态分布函数的极值点随加性噪声、乘性噪声和注入信号的变化情况。结果表明 ,乘性噪声是使激光系统出现一级相变类比的关键因素 ,注入信号使相变行为减弱 。

The steady state intensity distribution function is derived from a single mode gain-noise laser model. The extrema of the steady state distribution function is investigated as the additive noise, multiplicative noise and injected signal are changing. It is shown that the multiplicative noise plays a key rule in the first-order-like phase transition in a laser system. The injected signal can reduce the phase transition. The additive noise causes the number and locations of the extrema in the steady state distribution function jumping back and forth.