光网络中的分插复用技术

随着通信技术的发展,对全光网络的发展需要越来越迫切。光分插复用技术是实现全光网络的关键技术之一。重点介绍了光网络中分插复用技术的基本原理、具体实现方案和结构组成,并结合其研究进展简要分析了光网络中分插复用技术的发展趋势和应用前景。

全光网通信的实现

全光网(AON)就是网中直到终端用户节点之间的信号通道仍然保持着光的形式,中间没有光电转换器。信息传递过程无需面对电子器件处理信息速率难以提高的困难。文章对当前全光网络的实现进行了分析,介绍了全光网络软硬件技术,从光传输、光器件,光节点技术和光接入技术四个方面进行分析。指出了与电理论和器件相比,光理论和器件还很不成熟。自动交换光网络(ASON)是全光网实现的软件基础。

Waveguide Filter for Reducing Crosstalkin All Optical Networks

A novel filter structure which can reduce the crosstalk in cross-connection and switching in all optical networks based on dense wavelength division multiplexing (DWDM) is presented. The filter is constructed by dielectric waveguide with the waveguide boundary or the waveguide itself uncontinuous in transmitting direction. Using the concept of effective refractive index of plane waveguide system, we can get a special index profile along the wave propagation direction by alternatively changing the thickness of waveguide film or its refractive index. Having proved this kind of waveguides with filtering properties, the design principle of an example is given, which will be very useful to reduce the crosstalk in optical cross-connection and switching in all optical networks based on DWDM. This kind of filters can be easily connected with other related component.

WDM全光通信网

本文介绍了WDM全光网的概念及其网络分层结构 ,然后从实现的角度讨论了WDM全光网的几个关键技术 。