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关于波分复用技术的研究

论文作者:www.51lunwen.org论文属性:作业 Assignment登出时间:2016-03-24编辑:cari2点击率:2403

论文字数:1207论文编号:org201603181420169339语种:英语论文 English地区:瑞典价格:免费论文

关键词:Theoretical EvaluationWDMSubsystemCommunications Essay通信系统

摘要:本文对波分复用技术进行了研究,它采用不同的波长来传输数据,支持数据的同时传播,并且可实现单根纤维携带几百吉咖比特的信息。

随着消费者对宽带提出了越来越多的需求,我们倾向于使用不同的传输技术来提高宽带各方面的性能。技术包括各种不同形式的多路传输。最主要的多路传输形式包括时分复用技术,频分多路复用技术和波分复用技术。每种技术通过一些条件增加了介质的传输能力。


光网络的起源可以追溯到光纤技术的发展。波分复用技术在光网络上的应用增加了现有光纤的容量。波分复用技术采用不同波长的光来传输数据,数元平行或者按字符串行进行处理。光网络的一个非常重要的组成部分就是它允许数据的同时传输。目前可用的系统支持每纤维约100波长,可实现单根纤维携带几百吉咖比特的信息。我们来评估波分复用技术的子系统基于数学计算和理论评价的性能因素。


波分复用技术的介绍

With increasing demand of consumers for more bandwidth we tend to use different transmission techniques with increasing performance in terms of bandwidth. Techniques include different forms of multiplexing. The main forms of multiplexing used are time division multiplexing (TDM), Frequency division multiplexing (FDM) and Wavelength division multiplexing (WDM). Each technique employed increases the transmission capability of the medium by some factor.

Developments in Optical fibre technology gave origins to optical networks. Application of WDM on an optical network increases the capacity of the existing fibres.WDM employs different light wavelengths to transmit data parallel-by-bit or serial-by-character. It is a very crucial component of optical networks that will allow the transmission of data simultaneously. Currently available systems support up to about 100 wavelengths per fibre, enabling a single fibre to carry several hundred gigabits of information. Let's evaluate the WDM subsystem for performance factors based on mathematical calculations and theoretical evaluation.

Introduction to WDM 波分复用技术的介绍

The basic concept of this system is to split the light into different wavelengths and use it as a transmission media to transmit data through same channel thereby increasing the overall transmission capacity of the channel.

This system uses signals of different wavelengths and multiplexes them using multiplexer on the transmission side and demultiplexer to get individual signals on the receivers end.

Wavelength Division Multiplexer is a device that combines optical signals from multiple different single-wavelength end devices onto a single fiber. Wavelength Division Multiplexer carries two to four wavelengths per fiber. Typically, the same device can also perform the reverse process with the same WDM techniques: de-compose the data stream with multiple wavelengths into multiple single wavelength data streams, a process call de-multiplexing. Therefore, it is very often a Wavelength Division Multiplexer and Demultiplexer is in the same box

Wavelength Division Multiplexing (WDM) is a fibre-optic transmission technique. It involves the process of multiplexing many different wavelength signals onto a single fibre. So each fibre has a set of parallel optical channels, each using slightly different light wavelengths. From the instrumentation point of view optical fibre have some integral benefits over conventional information carriers like copper wires.

Advantages such as: 
Wide signal bandwidth
Electrical isolation
No cross talk
Interference immunity
Light weight
Low volume cabling
The following diagram shows the working of a WDM subsystem

{Source: Fiber optic communication by Joseph C. Palais fifth edition }

Where ds1, ds2, ds3....dsn are the different data signals to be transmitted. dl1, dl2, dl3.... dln are the multiplexed signals th论文英语论文网提供整理,提供论文代写英语论文代写代写论文代写英语论文代写留学生论文代写英文论文留学生论文代写相关核心关键词搜索。

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