摘 要
支撑光网络的关键技术基本上可分为光传输技术、光交换技术两大类。在光纤传输技术方面取得巨大发展的同时，另一部份光交换技术也必须协调发展，因此对交换节点的处理能力提出了新的要求。然而现有的交换网络采用的交换技术，都是基于电的交换技术。在每个交换节点，为了提取控制信息，光信号必须进行光-电-光变换。这就出现了较慢的电处理速度与极快的光传输速率的不匹配，从而限制了整个网络性能的提高。这也就是我们经常讨论的“电子瓶颈”。光标记交换是一种光交换新技术, 能有效克服光交换中的电子瓶颈, 其技术关键是光标记的产生和提取。本文介绍多种光标记交换技术,包括副载波复用、载波抑制和分离、正交调制,比较各自的优缺点及实用前景.本文重点利用M-Z调制器实现载波抑制，用optisystem软件仿真实现光标记交换.然后介绍一种基于光标记交换技术的全光网络的新的设计方案, 叙述了这种方案的设计原理和该网络的功能, 给出了光标记交换全光网的拓扑结构和OL S 节点的结构。
关键词:全光通信网,光标记交换,载波抑制大学论文网www.wnwu.com
ABSTRACT
The key technology to support optical network can basically be divided into optical transmission technology and optical switching technology. As the development of the optic fiber transmission technology, another part of optical switching technology development must be coordinated, so demanding for the handling capacity of switching nodes. However, the existing exchange network used to exchange technology, are based on the power switching technology. In order to extract control information, optical signals must be light - electrical - optical transform in each exchange node. It’s that a slower processing speed of the electric light and fast transmission rate does not match, thus limiting the increase in the overall network performance. It is "electronic bottleneck". Abstract Optical label Swapping (OLS) is a new technology of optical switch, which can overcome electronic bottleneck effectively. The key technology of OLS is how to produce and erase optical labe1. This paper describes and discusses sub-carrier multiplexing, optical carrier suppression and separation, quartered modulation technologies, compares and analyzes not only the strengths and limitations of these technologies, but also the vista of practical application. Focus on the use of M-Z modulators to achieve carrier suppression, using optisystem software simulation to achieve Optical Label Switching. In this paper, a new kind of all optical network device project based on the optical label switches technologies is put forward and the device principle of this project and the functions of the network are recounted and the topology of optical label switch all optical network and the knot structure are presented .大学论文网www.wnwu.com
Key words：All-optical communication network,optical label switching, Carrier suppression
目 录
第1章 绪论 1
1.1 现代光交换技术 1
1.1.1 光线路交换 1
1.1.2 光突发交换 2
1.1.3 光分组交换 4
1.2 基于光标记交换技术的全光通信网 6
第2 章 应用于全光通信网的新型光标记交换技术 10
2.1新型幅载波复用光标记交换 10
2.2 基于正交调制FSK/ASK光标记交换技术 12
第3章 基于光载波抑制的光标记交换 16
3.1载波抑制调制原理 大学论文网www.wnwu.com16
3.2 基于载波抑制调制的光标记产生和交换技术 19
3.2.1光标记的产生原理 19
3.2.2 光标记的交换原理 20
3.3仿真实现 20
3.3.1 optisystem简介 20
3.3.2旧标记的产生和载荷的产生 22
3.3.3旧标记的接收和标记的交换、载荷的接收 26
结束语 32
参考文献 33
致谢 34
