数值研究量子阱激光器的大信号调制特性  

Large-Signal Modulation Characteristics of Low-power Quantum Well Lasers

作　　者：杨丽寰[1] 

机构地区：[1]陇东学院电气工程学院,甘肃庆阳745000

出　　处：《陇东学院学报》2013年第1期27-29,共3页Journal of Longdong University

摘　　要：在小信号理论的研究基础上,本文对量子阱半导体激光器的大信号调制响应特性进行了研究.大信号调制下的非线性增益效应使得速率方程求解过程变得很复杂,因为载流子密度和光子密度的不仅与时间有关也与频率有关.大信号调制下,会产生频率啁啾效应,从而导致光谱加宽.本文先建立多量子阱激光器的速率方程模型,然后数值求解速率方程,对激光器的大信号调制特性进行了分析.Based on the study of small-signal theory, the large-signal modulation response of quantum well semiconductor laser semiconductor laser characteristics is studied. The large signal a nonlinear gain effect led the rate equation become very complex, because carriers density and the photon density is related not only with time but also with frequency. Nonlinear effects become more significant under large-signal mod- ulation, leading to frequency chirp which makes a wider spectrum. This paper first establish the rate of e- quation model of the quantum well semiconductor laser, and then solute the rate equation with the numer- ical method. Finally the large signal modulation bandwidth of the low-power laser is analyzed.

关 键 词：量子阱激光器 速率方程 大信号调制 

分 类 号：TN248.4[电子电信—物理电子学]