文档介绍：毕业设计(论文)
基于码分复用技术的光分插复用器(OADM)的设计
摘要
随着各种高速通信业务的出现和接入用户数目的增加,对现有的通信网带来了不少的压力,由于WDM (波分复用)以及DWDM (密集波分复用)的出现,缓解了网络的带宽问题。传统的WDM中的分插复用设备(ADM)采用O-E-O的处理方式,对每个通道的信号都要单独的处理,当WDM的通道数达到一定程度后,它需要的设备变得非常冗杂且成本也十分昂贵,除此之外,由于电子处理速率的瓶颈,当通道的速率达到一定值后,电子处理就变得束手无策了。这就产生了在光域层来管理网络容量的强烈要求,而全光交换的OADM正适应了这种需求。全光交换无需光电转换,因此不受电子处理速率瓶颈限制,且可透明传输各种接入方式的数据,能提高网络的灵活性和可控性,使其成为现代全光网的一个关键的器件。论文详细介绍了光码分多址的发展现状及其面临的问题。光码分多址技术(OCDMA)是一种极具发展潜力的扩容技术,特别是在光纤光栅技术逐渐完善的条件下,光码分多址技术势必成为未来光通信系统中重要的工具。本文首先对OCDMA系统原理进行了分析;结合光纤光栅阵列的滤波特性和空间延时特性,对OCDMA网络中关键器件OADM进行了设计。并分析了它的特点与应用。
关键词波分复用光码分多址技术;光分插复用器;光纤光栅
Abstract
Along with various appearances of high-speed service and the number of access user increase, there are many pressures on the work.
At the beginning, the appearance of WDM (wavelength division multiplying), as well as DWDM (crowded wavelength division multiplying), alleviated work band width question. The multiplying equipment (ADM) of the traditional WDM adopted O-E-O mode, and processed independently to each channel signal. As the WDM channel number reached a certain degree, it needed a plex equipment including more ADM. Meanwhile the cost would be very expensive. In addition, due to the limitation on the electronic processing speed, the electricity processing would not run well, once the channel speed reached some certain level.
Thus, an intense demand that people needed manage work capacity in the light territory level arose. Fortunately, the entire light exchange OADM has been meeting the demand.
It is not necessary for the entire light exchange to transform between light and electricity, so there is no effect on it from the electronic processing speed limitation. Besides, it can transmit transparently any kind of data inputted in different way, and enhance the flexibility and the controllability work. These advantages make it e an ponent of the modern entire .
This article introduces the function and the use about OCDMA, and the question it is meeting. It is an extended technology. And it