多波长光交叉连接节点中的串扰研究

密集波分复用技术(DWDM)在提供传输能力的同时,还具有无可比拟的联网优势.光交叉连接(OXC)是其中的关键技术.由于OXC可对光波长进行全光的交叉连接,极大的提高了系统的容量.但由于在光链路上没有电的再生,使得噪音在光信道上积累起来,尤其是引入无法消除的同频串扰对系统造成了严重的影响.本文从全光通信网络(AON)的几种节点结构出发,讨论了信道的串扰机制,并对如何优化OXC节点结构进行了研究.

ANALYSIS OF CROSSTALK IN MULTIWAVELENGTH OPTICAL CROSS CONNECT

Optical networking as embodied by dense wavelength division multiplexing (DWDM),has revolutionized long distance transport and has resulted in capacity enlargement,cost reduction,and operations simplification.OXC can realize cross connect in optical field but it induce hetro crosstalk which can not be reduced.In this thesis,their nature and accumulation behaviors are studied where the crosstalk elements fall within the signal wavelength carrier band is much more delecterious to the network end end transparence performance.Three multi OXC node architectures realizing similar optical cross connecting functions have been analyzed.System penalty analysis associated with the crosstalk is also carried out using realistic system and device parameters.The results show that with carefully designed optical cross connect architecture,it should be possible to construct fairly large meshed all optical networks.