Application Research Of The WDM/DWDM System In The Long-distance Light Transport Network

With fast increasing of internet portfolio and all kinds of communication portfolios, the exigent problem for telegraphic corporation is how to satisfy the requirement of transmission capacity and bandwidth. The appearance and development of DWDM turn more transmission capacity of optical cable in existence into real. That is how to construct DWDM optical cable transmission system use optical fiber net resource and DWDM technology in reason.This paper researches the technology problem of construct DWDM optical cable transmission system. Proposes the technology index, parameters and requirement in engineering combine the engineering construction examples in existence. This paper includes 4 chapters. The first chapter introduces this topic research goal and the significance, as well as the optical fiber communications as well as the wavelength division multiplying technology development present situation, has simultaneously enumerated the influence wavelength division system primary factor, and elaborated this article studies primary coverage.The chapter 3 introduces detailedly the design of DWDM transmission net, includes integration design, the calculation of the most relay distance, the management of transmission net, the protection of transmission net, the performance transmission.The chapter 4 gives a detail design of integrate DWDM system, combines the real requirement for northeast annular WDM system of china mobile interprovincial optical transmission net, includes detail net project, the calculation of parameters, and proposes the problem need resolve.The chapter 5 is the full text summary.Has carried on the summary to the full text, and has carried on the forecast to several new technical questions.