波长转换对光交叉连接节点中串扰的影响  

The Impact of Wavelength Conversion on Crosstalk in Optical Cross-connect Nodes

作　　者：管爱红[1] 王锋[1] 孙军强[2] 

机构地区：[1]河南工业大学信息学院,河南郑州450052 [2]华中科技大学武汉光电国家实验室,湖北武汉430074

出　　处：《光电子．激光》2007年第10期1203-1207,共5页Journal of Optoelectronics·Laser

摘　　要：针对具有波长转换功能的节点共享型和链路共享型光交叉连接(OXC)节点,分析了相干串扰和非相干串扰引起的功率代价并进行了仿真计算。结果表明,相干串扰引起的功率代价远远大于非相干串扰,尤其当时间延迟小于激光器的相干时间并小于码型周期时,串扰引起的功率代价最大。为达到一定的系统性能,分析了WDM光网络对器件的要求,并比较了波长转换器的加入对OXC节点串扰的影响,结果发现,加入波长转换器后,系统的功率代价有一定的改善,相同条件下波长转换器的加入对器件的隔离度要求降低2 dB。Crosstalk introduced by optical cross-connect nodes（OXCs） in an important limiting factor in optical dense wavelength division multiplexing（DWDM） networks. The implementation of wavelength converters in the OXCs is a key step towards the all-optical networks. The crosstalk sources in the share-per-node OXCs and share-per-link OXCs are identified, and the power penalty imposed by these crosstalk are calculated. Results show that the coherent crosstalk is found to be the most important limitation in OXCs, especially when the delay between the signal and crosstalk is less than the bit duration. At the same time,the impact of wavelength conversion on crosstalk in OXCs in considered. It can be found that the impact of crosstalk will be reduced compared with the case without wavelength converter.

关 键 词：光交叉连接(OXC) 波长转换 相干串扰 非相干串扰 功率代价 

分 类 号：TN929.11[电子电信—通信与信息系统]