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先进光纤通信系统课件.ppt

发布:2018-06-16约4.46千字共21页下载文档
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先进光纤通信系统 张新亮 Email: xlzhang@mail.hust.edu.cn Mobile课程简介(1) 32 学时/ 2学分; 讲课为主,穿插讨论 考试:开卷考试 Contents Introduction Key technologies in DWDM ultra-long haul transmission systems Key technologies in OTDM transmission systems Key technologies in OCDMA and coherent optical transmission systems Coherent optical communication systems Node technologies in next generation optical network References 《Fiber-optic Communication Systems》6-11章 顾畹仪,WDM超长距离光传输技术 《Phase-modulated communication systems》 Introduction Review on fundamental fiber-optic communication systems Key factors to be considered in three basic parts Transmitters: Output power, linewidth, modulation Fiber: Loss, dispersion, nonlinearity Receiver: Bandwidth, noise, sensitivity Introduction of OAs———DWDM Configuration of DWDM systems Key technologies in OTDM systems Ultra-short pulse generation Optical Multiplexing Optical signal processing---Optical time demultiplexing / optical time add-drop All-optical clock recovery All-optical Sampling Ultrashort pulse transmission and dispersion management Key technologies in network nodes Regeneration and switching Regeneration: clock recovery, wavelength conversion and 2R regeneration Switching: logic, buffer and switching matrix * 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 * * * Fiber Relayer Optical Transmitter Optical Receiver Electrical Transmitter Subscriber Fiber Electrical Receiver Subscriber 光纤通信 系统 光纤 光发射机 光接收机 损耗 色散 非线性 光源 发射机 驱动电路 和外调制 光探测器 接收机灵 敏度分析 Fiber Loss Fiber Dispersion Fiber Nonlinearity 低速 高速 DWDM:多信道高速长距离 BL积增大,容量提高 工作窗口向长波长方向移动; 制作无水光纤; 使用EDFA; 色散位移光纤; 色散补偿光纤; 低PMD光纤; 非零色散位移光纤; 大有效面积光纤; 色散平坦光纤; 无水光纤; 目前DWDM光纤通信系统中为什么要采用大有效面积非零色散位移光纤 ??? homojunction Double heterostructure Stripe geometry Multi-quantum-well 载流子限制作用加强, 光子限制作用加强 激光器阈值电流降低 Sampled Grating DBR Laser High SMSR, large tuning range, integrated with SOA, power variations PN光电二极管 PIN 双异质结PIN APD SAM-APD SAGM-APD:M?f=70GHz SAGCM-APD: :M?f=140GHz Trade-off be
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