随着IP业务井喷式的爆发，现在的宽带容量越来越面临巨大的压力。网络容量必须跟上这一要求，而WDM技术恰好能利用光纤的巨大带宽，满足这一要求，并能极大降低传输数字信号的代价。这使的WDM网络成为现代通信技术中比较吸引人们的技术。WDM全光通信网以其良好的性能越来越受重视。可以预见在不久的将来，WDM全光网络将得到极大的应用。WDM光网络离不开光电器件，本篇论文研究了光电器件中的光放大光放大部分。通过稀土能级的稳态族粒子数研究，建立了光在其掺杂放大器中的传播模型，基于Yb/Er速率方程和传输方程，分析了高浓度稀土元素对集成光学Yb/Er玻璃放大的负面效应和抑制策略，同质CET导致离子观察寿命的减少，有时同时伴有光发射。异质CET导致的群效应，增加了各种能量的损耗，减少了最大可用增益，极大的影响放大器的特性，降低了器件的全面效率。研究结果对器件的设计和制作工艺具有指导意义。波长变换技术是近几年来研究的热点，本文从网络的传输、性能、管理等方面分析它对网络的影响。对RWA问题人们研究以久，本文从网络负载均衡问题出发，引进FJ算法，它既能减少网络阻塞率，又能合理分配网络资源，并从着一角度出发，提出对权重的修改意见。文章最后对WDM全光网络的情景做了一个美好的展望。

As the current network bandwith is exausting，the network capacity must be expanded to meet the increasing bandwidth demand of IP services。Because the WDM technology can fully utilize the enormous bandwith of the optical fiber，the cost for transferring data can be greatly decreased。This enables WDM technology to be the most attractable technology in wide backbone network。WDM all-optical network can meet the need of modern network communication with good performance。Optical devices are important to WDM network，This paper espacilly focus on the amplifer。With the research of population of equilibrium condition cluster of rare-earth nenergy level,we create the optical transmission template in doped Amplifiers.According to the rate equation and transmission equation of Yb/Er,We analyze high chroma rare-earth elements’effect to interated optics Yb/Er glass amplifiers and the tactics of check..HomoCET result in the decrease of ion observing longevity, going with optical emission.HeterCET result in group effect.It increase each kind of loss of energy,and decrease the most use of gain.It affect the amplifiers’characteristics greatly,and decrease the complete efficiency. it introduces the technology of wavelenth，espacially specifies the influence of wavelength。RWA has been a problem very long，we can find many ways in it，the paper give us a new way，it can be employed to distribute the hardware resoruse of the networks effectively and to reduced the blocking probability problem,which was named FJ algorith.By using alternative routing method with adaptive element，the new dynamic RWA algorithm guarantees low blocking probability and high tolerance of the network mistakes。In the last，this paper give us a good future of WDM。