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基于数字交叉开关的波分复用光互连网络设计 总被引:4,自引:2,他引:2
设计了一种双层波分复用(WDM)光互连网络。上层为采用WDM和硬件路由技术的光纤环网,下层为采用8通道10Gbit/s数字交叉开关设计的星型网络。根据互连带宽要求,分别设计了两种支持1.056Git/s和4.224Gbit/s PCI总线全带宽的光网络接口卡(ONIC)。利用现场可编程门阵列(FPGA)在光互连网络中实现了数据包的硬件路由以及数字交叉开关的动态配置。随着网络规模扩展,每增加1个子网,子网间最大通信延迟增量仅为1.5μs。 相似文献
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WDM光网络中的业务量疏导 总被引:1,自引:0,他引:1
波分复用(WDM)技术在主干传送网中巳广泛应用,WDM光网络的研究进展也非常迅速,光网络中的业务量疏导定义为复用、解复用和交换低速率业务流到大容量的光路中的行为。介绍了WDM光网络的业务量疏导的重要性,研究方法及其最新研究进展情况。 相似文献
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综述了近年来Si基光互连,尤其是和微电子工艺兼容程度较高的芯片间和芯片内的光互连的进展。Luxtera公司已经率先实现了除光源外的所有光子器件的单片集成,IBM也提出并开始实施微电子学领域的片内光互连的技术方案,但Si基光互连大部分还停留在各构建单元器件性能提高的阶段,例如Si基发光、Si波导、Si波导耦合器、Si基调制器及光开关、Si基探测器以及用于光波导器件阵列的WDM技术。此外,还对Si基光源、光纤耦合、偏振敏感性以及光子器件的热稳定性提出了看法。总之,随着各种构建单元器件的综合性能、CMOS工艺兼容度、制备成品率的提高以及光电融合单片集成工艺的突破,光互连最终会成为现实,并引发微电子技术和IC行业的下一场革命。 相似文献
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光波分复用(WDM)、光时分复用(OTDM)和光码分多址复用(OCDMA)是光网络可采用的三种光复用技术。本对这三种技术的实现原理,各自的优缺点以及相互关系作了详细的比较说明。在未来的光网络中,如果能将三种光复用技术结合起来使用,则光纤巨大的带宽资源将得到最充分的利用。 相似文献
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We demonstrate a linear bus wavelength‐reused gigabit wavelength‐division multiplexing passive optical network (WDM‐PON) with multiple optical add‐drop nodes. A commercially available reflective semiconductor optical amplifier‐based WDM‐PON has a sufficient power budget to provide multiple optical add/drop nodes in 16 WDM channels. Sixteen 1.25 Gb/s WDM channels are successfully transmitted over 20 km of single‐mode fiber with four optical add/drop multiplexers, even with 32 dB reflection and chromatic dispersion in the link. 相似文献
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光纤光栅和环行器构成的多路光分插复用器 总被引:1,自引:0,他引:1
讨论由光纤光栅和光环行器构成的光分插复用器的结构,性能和特点,提出采用一段刻有多个光纤布拉格光栅的光纤,两个光环行器,WDM复用器和解复用器等器件,构造能够对WDM的多个信道实施分插操作的光分插复用器,该光分插复用器的插入损耗要比简单地把多个单路的光分插复用器进行级联时小得多,波分复用全光网络中的光分插复用技术,是实现波分复用网络的关键技术之一。 相似文献
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超高速光时分复用技术实现及发展 总被引:1,自引:0,他引:1
以单波道160Gbit/s传输为例,介绍了光时分复用技术的基本原理,对其中的关键技术进行了分断、比较,并对更高速的OTDM传输技术做了探讨。 相似文献
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近几年来,由于低损耗单模光纤技术的进步,光网络已经被用来满足各种应用的需求。波分复用(WDM)技术被认为能更有效地利用巨大的光纤带宽。IP over WDM技术是网络发展的一个重要方向。本文提出了一种新型混合模型网络结构,并进行了模拟仿真研究,结果表明此技术是可行的。 相似文献
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Chan V.W.S. Hall K.L. Modiano E. Rauschenbach K.A. 《Lightwave Technology, Journal of》1998,16(12):2146-2168
Current optical networks are migrating to wavelength division multiplexing (WDM)-based fiber transport between traditional electronic multiplexers/demultiplexers, routers, and switches. Passive optical add-drop WDM networks have emerged but an optical data network that makes full use of the technologies of dynamic optical routing and switching exists only in experimental test-beds. This paper discusses architecture and technology issues for the design of high performance optical data networks with two classes of technologies, WDM and time division multiplexing (TDM). The WDM network architecture presented stresses WDM aware Internet protocol (IP), taking full advantage of optical reconfiguration, optical protection and restoration, traffic grooming to minimize electronics costs, and optical flow-switching for large transactions. Special attention is paid to the access network where innovative approaches to architecture may have a significant cost benefit. In the more distant future, ultrahigh-speed optical TDM networks, operating at single stream data rates of 100 Gb/s, may offer unique advantages over WDM networks. These advantages may include the ability to provide integrated services to high-end users, multiple quality-of-service (QoS) levels, and truly flexible bandwidth-on-demand. The paper gives an overview of an ultrahigh-speed TDM network architecture and describes recent key technology developments such as high-speed sources, switches, buffers, and rate converters 相似文献
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相干光正交频分复用由于其良好的传输性能成为近年来光传输领域的研究热点,波分复用技术可以在光纤中通过增加并行波长的数量来提高系统的容量,将CO-OFDM和WDM技术结合,可以构造出高速率、大容量、低成本的光传输网络。文章首先对基于CO-OFDM的WDM传输系统的理论模型和基本原理进行了研究,然后对基于CO-OFDM的100Gb/s×32-信道WDM传输系统进行了仿真分析。并研究了该系统的传输性能。结果表明:在没有任何光纤的色散及非线性补偿的情况下,当信号速率为3.2 Tb/s时,系统的Q因子高于16.0 dB,在标准单模光纤中的传输距离可达1500km。 相似文献
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根据光纤通信无源器件对光学薄膜的特殊需求, 要求在光纤尾纤上镀制较复杂的波分复用滤光膜, 针对光纤镀膜所存在的难点问题, 利用TFCalc 膜系设计软件采用解析法设计出一个初始的规整膜系, 再结合梯度优化法在该规整膜系上有选择性的局部优化, 并考虑镀膜设备所允许的膜层灵敏度, 评估其鲁棒性和可镀制性, 从而设计出满足光谱特性要求的滤光膜膜系.然后通过对德国莱宝APS1104 型镀膜机进行内部结构改造并选择合适的冷镀工艺, 最终采用离子源辅助沉积对所设计的膜系进行了实际镀制, 获得了性能优良的光纤尾纤波分复用滤光膜. 相似文献
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Wavelength division multiplexing (WDM) is emerging as a viable solution to reduce the electronic processing bottleneck in very high-speed optical networks. A set of parallel and independent channels are created on a single fiber using this technique. Parallel communication utilizing the WDM channels may be accomplished in two ways: (i) bit serial, where each source-destination pair communicates using one wavelength and data are sent serially on this wavelength; and (ii) bit parallel, where each source-destination pair communicates using a subset of channels and data are sent in multiple-bit words. Three architectures are studied in the paper: single-hop bit-serial star, single-hop bit-parallel star, and multi-hop bit-parallel shufflenet. The objective of this paper is to evaluate these architectures with respect to average packet delay, network utilization, and link throughput. It is shown that the Shufflenet offers the lowest latency but suffers from high cost and low link throughput. The star topology with bit-parallel access offers lower latency than the bit-serial star, but is more expensive to implement. 相似文献