【作者】 王蕾；

【导师】 刘永；

【作者基本信息】 电子科技大学 ， 光学工程， 2013， 硕士

【摘要】 随着全球信息化时代的到来，以互联网为代表的数据业务量、业务范围及其增长率以惊人的速度增长，这迫使人们要使用具有巨大带宽、高的传输速率和灵活性的全光通信网络来代替现有的电信网络。在以光传输和光交换为核心的全光网络中，光开关起着举足轻重的作用，主要表现在波长选择、路由选择、光交叉连接、自愈保护等。利用半导体光放大器大线性系数、小体积、容易集成的特点，本文在太赫兹光学非对称解复用器（TOAD）上进行改进，提出了一种基于半导体光放大器非对称解复用结构的光开关方案，本文主要进行了以下几个方面的工作：1.对半导体光放大器进行理论分析，分析内容包括它的非线性、场传输基本方程、载流子速率方程、增益特性。对半导体光放大器的交叉增益调制效应采用OptiSystem7仿真，并以此为基础进行了基于半导体光放大器的交叉增益调制实验，为后续进行基于半导体光放大器非对称解复用结构的光开关实验提供理论依据和实验基石。2.提出了一种全新基于半导体光放大器非对称解复用结构的全光开关，理论分析了它的工作机制，通过MATLAB仿真，讨论了控制脉冲功率、延时时间、偏置电流对该全光开关的影响，为下一步的实验提供理论基础。3.对本文提出的基于半导体光放大器非对称解复用结构的全光开关进行实验研究，实现了窗口宽度可调的2.5GHz的光开关，对影响全光光开关窗口的偏置电流、光纤延迟线延时长度、控制光信号功率、连续光功率、连续光偏振态进行实验，并对实验结果进行分析。更多还原

【Abstract】 With the advent of the global information era, the Internet data traffic are growingrapidly, which forces people to use the all optical communications network to replacethe existing telecommunications network to achieve huge communication bandwidth,high transmission rate and flexibility switching. In the all-optical network wherehigh-speed transmission and all-optical switching are essential, optical switches play animportant role in the wavelength selection, routing, optical cross-connecting,self-healing protection. Due to the advantages of semiconductor optical amplifiers(SOAs) such as large nonlinear coefficiency, small volume, and easily being integrated,we propose and investigate a new kind of SOA-based optical switch with TOAD(terahertz optical asymmetric demultiplexer) configuration. The paper mainly includesthe following three parts.A theoretical analysis of the semiconductor optical amplifier is presented. Itincludes the nonlinearity, the basic equations of the field transmission, the carrier rateequation and the gain characteristics of SOA. The SOA-based cross-gain modulation issimulated by OptiSystem7, and the cross-gain modulation experiments is conducted.These results provide a solid basis for the investigation on optical switches.A new SOA-based all-optical switch is proposed and its working mechanism istheoretically analyzed. In the simulation using MATLAB, the impact of the controlpulse power, delay time, the bias current on the all-optical switch is discussed, which ishelpful for the next experiments.An experimental study on the proposed optical switch structure is carried out. Theexperiments have realized the optical switch with an adjustable width of the switchingwindow at2.5GHz. The research of the experiments have included the impact of biascurrent of SOA, the delay time induced by the optical delay line’s length, the controllingoptical signal power, continuous optical power, continuous polarization states of lightexperiment on the switching window. In the end, we give a detailed analysis on theexperimental results.更多还原