光网络技术发展与展望(韦乐平).doc

光网络技术发展与展望(韦乐平)
Development and Prospect of work technology
Wei
Optical munications, after years of fiber bubbles and years of silence, are beginning to show good momentum. Peer to munications (P2P) services represented by the booming business, mobile business continued to grow rapidly, IPTV business ready, the work bandwidth demand growth rate is still as high as 50% to 100%. These developments in the business level present new capabilities, capabilities, and performance requirements for the work, the foundation of the work. The following is a brief summary and outlook of several hot technologies in works.
Development and application of 1 and 40 Gbit/s systems
40 Gbit/s system mainly has the following advantages: it can more effectively use the transmission bandwidth, higher spectrum efficiency; when the 40 Gbit/s system cost reduced to 10 Gbit/s below times the cost of the system, we can achieve large-mercial, so as to reduce the cost of transmission; 1 element instead of the 4 element, can reduce the cost, complexity and OAM the number of spare parts; IP can effectively reduce the number of links, improve the scalability of nodes, efficiency and function improvement of work.
In recent years, with the popularity of P2P as the representative of applications due to the new IP traffic continues to rapidly increase, with 10 Gbit/s based on the existing long-distance work has been showing a "powerless" state, part of the paragraph 80 * 10 Gbit/s capacity is up to 40 Gbit/s, grow with each passing day the requirement of WDM system, its application has been on the agenda up.
In addition to market demand factors, the main factors affecting the 40 Gbit/s system are technology, price and PMD (polarization mode dispersion) performance of optical fiber cable lines. First of all, from the technical point of view, the 40 Gbit/s system after years of development, in terms of technology has made considerable progress. Can be applied to a variety of modulation technol