RESEARCH ON LARGE CAPACITY OPTICAL PATH CONFIGURATIONS BY USING OPTICAL MULTI/DEMULTIPLEXER

由于光纤具有高速宽带、低损耗、节约资源等固有的潜力，作为信息通信基础设施被广泛安装，而多媒体网络又需要高速/宽带传输系统，因此光子网络的研究非常具有吸引力。本文的重要研究目标是实现超高速/大容量传输技术、高密度波分复用（WDM）技术以及分层网络架构和质量。在未来基于波分复用的光子网络中，光信道分配是一个重要的问题。稳频和可调频光源是大容量传输、远距离传输和光交叉连接必不可少的光源。研究了具有稳定光波频率供应模块的光波网络的基本模型。通过提高脉冲扫描频率发生器的偏振灵敏度，实现了超过1000个光频表的脉冲扫描频率源模块。为了克服光纤色散的影响，研究了光单边带调制（optical SSB）。SSB调制具有信道带宽小、SSB- sc（抑制载波SSB）格式光功率低、光电色散均衡能力强等优点。通过仿真验证了该系统具有高密度波分复用能力的新特性。考虑业务需求及其分布、网络拓扑结构和链路故障情况，研究了可生存WDM光路网络的配置算法，包括路由和波长选择，以实现波长路径/虚拟波长路径（WP/VWP）调节，使波长数量最小化。所提出的启发式算法对网络规划是有效的。波长转换，如光移频器在路径将成为重要的光子GMPLS（广义多协议标签交换）路由器或MPA。创建下一代网络。综上所述，根据所提出的系统架构和传输技术，具有10倍大容量的高密度WDM网络将是可行的。少

Researches on photonic networks are very attractive because optical fibers have the inherent potentials of high-speed and wideband characteristics, low loss, resource saving, they are installed widely as information communications infrastructure, and multimedia networks require very high-speed/wideband transport systems. Important research objectives in this study are to realize ultra high-speed/large capacity transmission technology, high-density wavelength division multiplexing (WDM) technology and layered network architectures and quality.In future WDM-based photonic network, optical channel allocation is one of the important items. Frequency stabilization and tunable frequency light sources are indispensable for large capacity transmission, long distance transmission, and optical cross-connect. Basic model of light wave networks with stabilized light wave frequency supply module are investigated. The light wave supply module with pulsed sweep frequency generator is realized around … More 1,000 optical frequency timetables by improving its polarization sensitivity.The optical single sideband modulation (optical SSB) is investigated to overcome the effect of chromatic dispersion of the fiber. SSB modulation has such advantages as small bandwidth of a channel, low optical power of the SSB-SC (suppressed carrier SSB) format, and optical and electrical dispersion equalization capability. The novel property including high-density WDM capability was confirmed by simulation.Provisioning algorithm for survivable WDM optical path networks including routing and wavelength selection was studied for WP/VWP (wavelength path/virtual wavelength path) accommodation that can minimize the required number of wavelengths considering traffic demand and its distribution, network topology, and link failure scenario. The proposed heuristic algorithm shows the effectiveness for network planning. Wavelength conversion such as an optical frequency shifter over the path will become important in photonic GMPLS (Generalized Multi-Protocol Label Switching) router or MPA.S to create next generation networks. In summary, high density WDM networks with 10 times larger capacity will be feasible by the proposed system architecture and the transmission technology. Less