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、节省资源等特性，被广泛用作信息通信基础设施，而多媒体网络需要极高速/宽带的传输系统，因此光子网络的研究具有很大的吸引力。本研究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）技术以及分层网络结构和质量，在未来基于WDM的光网络中，光信道分配是重要的研究内容之一。稳频可调谐光源是大容量传输、长距离传输和光交叉连接不可缺少的光源。研究了光波网络的基本模型，给出了光波稳频模块。围绕脉冲扫频发生器实现了光波电源模块 ...更多信息 通过提高光纤的偏振灵敏度，获得了1,000个光频率表，并研究了克服光纤色散效应的光单边带调制（optical single sideband modulation，简称optical SSB）。SSB调制具有信道带宽小、SSB-SC（抑制载波SSB）格式的光功率低以及光和电色散均衡能力等优点。通过仿真验证了该网络具有高密度WDM能力的特性，并研究了可生存WDM光路网络的路由和波长选择算法，以适应WP/VWP（wavelengthpath/virtualwavelengthpath）网络，在考虑业务需求及其分布、网络拓扑和链路故障的情况下，使所需波长数最小。该启发式算法对网络规划问题的有效性进行了验证。波长转换，如在路径上的光频移器将成为重要的光子GMPLS（通用多协议标签交换）路由器或MPA.S创建下一代网络。总之，高密度的WDM网络与10倍以上的容量将是可行的，所提出的系统架构和传输技术。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