共查询到20条相似文献,搜索用时 15 毫秒
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We express a photonic packet switch prototype based on optical label processing methods which dramatically increase the label processing capability. We experimentally demonstrate 40Gbit/s/port packet switching and optical buffering capabilities of the prototype. 相似文献
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A WDM compatible Edge-to-Edge Self-Routed optical packet switched network that simplifies the optical processing is proposed. The system employs all-optical packet label generation and recognition using coded superstructured Fiber Bragg gratings. 相似文献
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G. Emory Anderson 《Fiber and Integrated Optics》2002,21(5):345-359
This article discusses the evolution of Synchronous Optical Network (SONET) towards support for shared packet media, particularly in light of new developments in the control plane, such as Generalized Multiprotocol Label Switching (GMPLS) and the (UNI) specification. Whereas the current SONET network is largely static and circuitcentered, and typically supports DS-1 and DS-3-level granularities, the emerging packet-centric, GMPLS-controlled optical network will be significantly more dynamic, and characterized by concatenated or virtually concatenated payloads such as STS-3c/12c/48c/192c, and, possibly, STS-1-24v (i.e., 'STS-24c'). In this environment, it will be shown that the differences between such packet-centric SONET networks and 'IP over Optical' network architectures begin to disappear. 相似文献
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G. Emory Anderson 《Fiber and Integrated Optics》2013,32(5):345-359
This article discusses the evolution of Synchronous Optical Network (SONET) towards support for shared packet media, particularly in light of new developments in the control plane, such as Generalized Multiprotocol Label Switching (GMPLS) and the (UNI) specification. Whereas the current SONET network is largely static and circuitcentered, and typically supports DS-1 and DS-3-level granularities, the emerging packet-centric, GMPLS-controlled optical network will be significantly more dynamic, and characterized by concatenated or virtually concatenated payloads such as STS-3c/12c/48c/192c, and, possibly, STS-1-24v (i.e., 'STS-24c'). In this environment, it will be shown that the differences between such packet-centric SONET networks and 'IP over Optical' network architectures begin to disappear. 相似文献
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Naoko Kawakami Kayo Shimizu Naoya Wada Fumito Kubota Kashiko Kodate 《Optical Review》2004,11(2):126-131
A holographic label processor for photonic packet switching is proposed. We observe the process of time-to-space conversion for an optical code consisting of 2 ps pulses at a wavelength of 1.55 $mUm with 100 km fiber transmission. Label recognition using an angular multiplexed spectral hologram (AMSH) as a label bank is experimentally demonstrated. We also investigate the AMSH by CGH and confirm its feasibility in computer simulations. 相似文献
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Photophysical processes in pyrane substitutes excited by high-power laser radiation are investigated. It is demonstrated that the examined molecules offer promise as active media of tunable lasers (including solid-state lasers), optical radiation limiters with = 532 nm, and emitting layers of organic light diodes. 相似文献
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光突发交换的交换控制策略和光缓存配置 总被引:2,自引:2,他引:2
光突发交换是面向下一代互联网的光交换模式.讨论了异步光突发交换系统的交换控制策略以及相应光缓存的优化配置策略.除了传统预约模式的交换策略,还研究了非预约和改进型预约模式,它们的性能评估由计算机仿真给出.结果表明:在条件相当情况下,改进型预约模式具有最低的丢包率.同时光缓存的配置对上述几类交换控制策略的性能都有很大影响,仿真结果指出:光缓存的粒度对系统性能具有重要影响,所讨论的几类交换模式都存在最佳时延粒度,研究结果对光交换矩阵的设计有指导意义. 相似文献
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提出了两种适用于光突发交换网的可编程光缓存器结构:交叉型和多端口开关型.两种结构都能满足突发包缓存的超长性和可变性的要求,且结构简单紧凑,成本低,可扩展.交叉型缓存器通过指定信号在每个子缓存模块的光纤环中的循环次数即能实现可变时间的延迟.多端口开关型缓存器通过指定信号在两个多端口开关相应端口与所接光纤延迟线组成的光纤环中的循环次数实现可变时间的延迟.仿真结果表明,两种可编程光缓存器都能对光突发包实现ns级指定时间延迟,可用于解决光突发交换网突发包的冲突问题. 相似文献
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研究并实现了几种光突发交换网络的关键技术,包括高速的突发组装技术、突发调度技术及突发光发射及接收技术等,其中突发接收具有较高的灵敏度和小于80 ns的时钟数据恢复时间.在这些技术的基础上,建立了一个灵活且可扩展的光突发交换网络实验平台.在OBS网络平台上进行了TCP性能评估实验和多QoS业务传输实验。实验结果表明光突发网络中丢包率严重影响其上TCP的性能,但若丢包率小于0.1%,则TCP性能可得到一定程度的保证.光突发交换网络实验平台上的TCP传输实验还表明了OBS物理层带来的额外延时对上层TCP带宽有极大的影响.实验结果还验证了OBS网络中的QoS保证机制. 相似文献
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Rajat Kumar Singh Rajiv Srivastava Yatindra Nath Singh 《Fiber and Integrated Optics》2013,32(6):321-334
Abstract In this article, we present the comparative analysis of various optical packet switch architectures. The comparison is done on the basis of bursty traffic arrival and the optical cost of various optical components used to build that switch. The architectures chosen for the analysis were previously proposed by us and their performance was evaluated only for the uniform random traffic arrival. Hence, this article can be considered as the cumulative and effective extension of the previous works. The computer simulations are performed to obtain the packet loss probability and average delay in presence of bursty traffic. 相似文献
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《Fiber and Integrated Optics》2007,26(6):321-334
In this article, we present the comparative analysis of various optical packet switch architectures. The comparison is done on the basis of bursty traffic arrival and the optical cost of various optical components used to build that switch. The architectures chosen for the analysis were previously proposed by us and their performance was evaluated only for the uniform random traffic arrival. Hence, this article can be considered as the cumulative and effective extension of the previous works. The computer simulations are performed to obtain the packet loss probability and average delay in presence of bursty traffic. 相似文献
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We demonstrate the routing operation of optical packets by an optical packet switch consisting of an optical digital-to-analog conversion-type header processor, a wavelength converter using an electrically-tunable laser, and an arrayed-waveguide grating router. A packet transfer by two -bit optical header was achieved for the first time. 相似文献
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Rajat Kumar Singh Rajiv Srivastava Yatindra Nath Singh 《Fiber and Integrated Optics》2013,32(5):381-393
Abstract This architecture incorporates wavelength-routed loop-buffer modules in the feed-forward configuration, and the buffering in these modules is recirculating in nature, using shared memory. The signal quality will deteriorate during each revolution, due to the insertion loss of the various optical components; therefore, it will impose a limit on the number of circulations that a packet can take in the buffer before its correct reception. Generally, this limit has not been considered in the past, but one should have to take care of it in the current scenario for the actual switching systems. 相似文献
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Novel MEMS torsion-mirror actuators with monolithically integrated fiber self-holding structures are fabricated,and investigated experimentally and theoretically. Their electromechanical and optical characteristics are acceptable for optical switching or attenuating applications. 相似文献