【作者】 高峰；

【导师】 陈福深；

【作者基本信息】 电子科技大学 ， 光学工程， 2013， 硕士

【摘要】 近年来互联网电信业务飞速发展，尤其以移动互联网、云计算、三网融合等为代表的新型信息业务迅速崛起，使得光网络的资源日趋紧张，对光网络的动态管理提出了更高的要求。除了100G、400G等高速端到端传输技术相继被提上日程外，更灵活及非标准的带宽规划也在研究者考虑的范畴之中。本文讨论了可变带宽光网络的基本概念，调研了该项技术目前的研究现状及关键的使能技术。OFDM既可以当作一种信号的调制格式，也可以看作一种频域的复用方案，其中全光OFDM技术以其独特的技术优势备受关注。例如：OFDM信号的光谱效率比较高；OFDM收发机的信号处理，可以利用高效率的DFT/IDFT算法。光OFDM系统根据信号处理方式的不同，即在光域处理还是在电域处理，可分为全光和非全光两种形式，文中通过推导分析OFDM的数学原理，说明了它和离散傅里叶变换的联系，随后介绍了多载波复用和超短光脉冲采样两种全光OFDM方案。第三章中针对八载波的全光DFT/IDFT结构进行了理论分析和优化，采用基于光耦合器的DFT/IDFT的设计，并用VPI软件验证了该结构对全光OFDM信号的解复用性能。本文第四章中用仿真验证的方法研究了几种基于马赫曾德尔调制器构成的新型多载波源的产生方案，包括：级联相位调制器多载波产生器、用双驱动推挽式马赫曾德调制器（DD-MZM）构成的多载波发生器以及基于RFS原理的多载波发生器。最后，针对可变带宽光网络中的一项关键组成部分ROADM，研究了其构成和内部的关键模块：可变带宽的波长选择开关（WSS），介绍了项目中完成的单板的功能及测试性能，并提出了一种适应于新型可变带宽光网络特性的发射机的架构。更多还原

【Abstract】 The industry of internet and telecommunication have rapid development in recentyears. Especially, a lot of new information services rise rapidly, such as mobile Internet,cloud computing and the integration of the three networks, make the optical networkresources become tighter. Therefore, higher quality dynamic management are demand.In addition to the100G/400G networks, the high-speed end-to-end transmissiontechnology have been put on the agenda. In the same time, the more flexible andnon-standard bandwidth planning is also into the research scope.This article discusses the basic concepts of variable bandwidth optical network,current research status and the key enabling technology. As a signal modulation formatand a frequency domain multiplexing scheme, all-optical OFDM technology has itsunique technical advantages. For example: an OFDM signal has high spectral efficiency,in the OFDM transceiver, signal processing can use of highly efficient DFT/IDFTalgorithms. The difference of all-optical OFDM and non-all-optical OFDM is whethersignal processing is in the optical domain or in the electrical domain.The follow chapters have dealt with the derivation of the mathematical principlesof OFDM, explain the relationship of All-optical OFDM and discrete Fourier transform,introduce two kind of all-optical OFDM scheme: the multi-carrier multiplexing schemeand the sampling of ultrashort light pulses scheme. In the third chapter, we analysis thetheory of all-optical DFT/IDFT structure with eight carriers, and optimize the structurebased on optocoupler. In this paper we use VPI software to proved the availability ofthis structure, and the experiments show its correctness.In Chapter four of this article, several new multi-carrier sources based on aMach-Zehnder modulator have been researched by using the simulation software,including: cascade multi-carrier phase modulator generator, multi-carrier generatordriven by dual-drive Mach-Zehnder modulator (DD-MZM), and the multi-carriergenerator based on the the RFS principle.Finally, this article study the ROADM which is the key composition of variablebandwidth optical network and its important part: variable bandwidth wavelength selective switch (WSS). Combining the work during the research stage, the articleproduce the features of the project, show the test performance of the finished board, andproposed an transmitter architecture,which is adapts to the novel variable bandwidthoptical network.更多还原