量子阱半导体激光器的模拟研究分析.doc

量子阱半导体激光器的模拟研究分析 孙涛 章双玉 陈小霞 熊廷文 文晋吾 刘波 吴国阳 朱善林 郭旭 ( 华中科技大学电子科学与技术系003班 武汉 430074 ) Simulation of Single Quantum Well Laser Diode Sun Tao Zhang Shuang-yu Chen Xiao-xia Xiong Ting-wen Wen Jing-wu Liu Bo Wu Guo-yang Zhu Shan-lin Guo Xu (Dept of Electronics of Science Technology, Hua Zhong Univ. of Science Technology, Wuhan 430074, P.R.China ) Abstract: The principle of single quantum well laser diode（SQW－LD）was reviewed．Discussion was given on the functionality of the gate－way state（quasi-2 dimensional state）which was introduced to describe the transportation of carriers and photons between the separated confinement heterostructure (SCH) and the quantum well．A relative complete set of the equations was presented through a equivalent circuit model ．By means of simulink，which is a functional module of Matlab， a mathematical model for digital analysis of SQW－LD was proposed． The Model is easy to use．It provides with the advantages of short computation time， real-time supervision and control，convenience for parameter modification．It was used to simulate the opto－electronic behaviors of SQW－LD， such as carrier/photon establishment under step drive current，optical power-drive current relationship，and frequency response to small signal modulation．The results are in good agreement with the reported data．The model can be used for the purpose of device technique improvement and for automatic design and performance simulation of optical fiber networks. Key words: Super lattice Quantum well Single quantum well laser diode (SQW－LD) rate equation Simulation 摘要： 分析了单量子阱激光器（SQW－LD）工作原理．阐述了载流子和光子在器件内部运动过程中，分别限制异质结构和量子陕之间引入过渡态（准二维态）的作用及必要性．在此基础上，通过量子阱激光器的等效电路模型，给出了完整的速率方程．使用simulink软件建立了SQW－LD的数值分析模型．对SQW－LD在阶跃驱动电流作用下载流子和光子浓度的建立过程、输出光功率与驱动电流之间的关系、小信号调制时的频率响应特性等进行了数值模拟分析．文中提出的数学模型及分析结果可用于量子阱激光器的工艺完善和制作、光纤通信网络的模拟设计和分析． 关键词．超晶格 量子阱 单量子阱激光器 速率方程 模拟分析 引言 超晶格是一种新型结构的半导体化合物，它是由两种极薄的不同材料的半导体单晶薄膜周期性地交替生长的多层异质结构，每层薄膜一般含几个以