量子级联激光器噪声特性的电路模拟  

Circuit simulation for noise of quantum cascade laser

作　　者：陈贵楚[1] 范广涵[2] 

机构地区：[1]广东省肇庆学院物理系 [2]华南师范大学光电子材料与技术研究所

出　　处：《激光杂志》2011年第2期14-15,共2页Laser Journal

基　　金：粤港关键领域重点突破项目(2007A010501008)

摘　　要：对文献报道的量子级联激光器的速率方程组进行简化,并引入Langevin噪声源,在单模与线性增益的情况下对速率方程进行了小信号处理,在此基础上构建了激光器的小信号电路模型,spice仿真结果表明激光器的噪声频谱的3-dB截止频率随光功率增加而增加,而噪声强度则随光功率增加而减少,当光功率很大时,它们都趋向于饱和值,得到的仿真结果与理论计算结果及实验结果相符。The rate equations simplified with the Langevin noise resources are treated with small signal variable under single mode and linear gain.On the basis of the small-signal rate equations,the circuit model of laser is set up.The spice simulations show that the 3-dB cut-off frequency of noise is increasing with the light power,otherwise the noise magnitude is reverse,but both are inclined to the saturating values while the light power gets very strong.

关 键 词：量子级联激光器 速率方程 电路模型 SPICE仿真 

分 类 号：TN248.1[电子电信—物理电子学]