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All-optical computing based on convolutional neural networks 被引量:8
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作者 Kun Liao Ye Chen +7 位作者 Zhongcheng Yu Xiaoyong Hu Xingyuan Wang Cuicui Lu Hongtao Lin Qingyang Du Juejun Hu Qihuang Gong 《Opto-Electronic Advances》 SCIE 2021年第11期46-54,共9页
The rapid development of information technology has fueled an ever-increasing demand for ultrafast and ultralow-en-ergy-consumption computing.Existing computing instruments are pre-dominantly electronic processors,whi... The rapid development of information technology has fueled an ever-increasing demand for ultrafast and ultralow-en-ergy-consumption computing.Existing computing instruments are pre-dominantly electronic processors,which use elec-trons as information carriers and possess von Neumann architecture featured by physical separation of storage and pro-cessing.The scaling of computing speed is limited not only by data transfer between memory and processing units,but also by RC delay associated with integrated circuits.Moreover,excessive heating due to Ohmic losses is becoming a severe bottleneck for both speed and power consumption scaling.Using photons as information carriers is a promising alternative.Owing to the weak third-order optical nonlinearity of conventional materials,building integrated photonic com-puting chips under traditional von Neumann architecture has been a challenge.Here,we report a new all-optical comput-ing framework to realize ultrafast and ultralow-energy-consumption all-optical computing based on convolutional neural networks.The device is constructed from cascaded silicon Y-shaped waveguides with side-coupled silicon waveguide segments which we termed“weight modulators”to enable complete phase and amplitude control in each waveguide branch.The generic device concept can be used for equation solving,multifunctional logic operations as well as many other mathematical operations.Multiple computing functions including transcendental equation solvers,multifarious logic gate operators,and half-adders were experimentally demonstrated to validate the all-optical computing performances.The time-of-flight of light through the network structure corresponds to an ultrafast computing time of the order of several picoseconds with an ultralow energy consumption of dozens of femtojoules per bit.Our approach can be further expan-ded to fulfill other complex computing tasks based on non-von Neumann architectures and thus paves a new way for on-chip all-optical computing. 展开更多
关键词 convolutional neural networks all-optical computing mathematical operations cascaded silicon waveguides
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Research on Fault Repair Method of All-Optical Network Based on SDN 被引量:1
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作者 Zhongnan Zhao Huiqiang Wang +1 位作者 Jian Wang Hongwei Guo 《China Communications》 SCIE CSCD 2020年第6期180-195,共16页
All-optical network,as a new backbone network,is featured with high speed and large capacity transmission.It may be out of order due to various faults while providing high-performance transmission service,thus more ef... All-optical network,as a new backbone network,is featured with high speed and large capacity transmission.It may be out of order due to various faults while providing high-performance transmission service,thus more effective fault repairing methods are required.A routing and wavelength assignment method based on SDN is designed and analyzed from the perspective of service function chaining in this paper.A multi-objective integer linear programming model based on impairment-aware and scheduling time is constructed by combining the unified control of control plane with the resource allocation mode of service function virtualization.Meanwhile,an improved Firefly Algorithm is adopted to solve the model for obtaining a better scheduling scheme,so as to the resources are allocated on-demand in a more flexible and efficient way,which effectively improved the self-recovery capability of the network.In the simulation experiments,Through the comparison between the method proposed and methods based on centralization and distribution,method proposed in the paper is superior to the compared ones in the indexes of survivability,blocking probability,link recovery time,and presents a better scheduling performance,makes the system has stronger ability of self-healing in the face of failure. 展开更多
关键词 SDN all-optical network fault repair routing and wavelength assignment
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Intelligent Space All-Optical Network Technology
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作者 DONG Tao YIN Jie +2 位作者 LIU Zhihui ZHANG Tingting GUO Hui 《Aerospace China》 2017年第4期19-25,共7页
Microwave transmission in a space network is greatly restricted due to precious radio spectrum resources. To meet the demand for large-bandwidth, global seamless coverage and on-demanding access, the Space All-Optical... Microwave transmission in a space network is greatly restricted due to precious radio spectrum resources. To meet the demand for large-bandwidth, global seamless coverage and on-demanding access, the Space All-Optical Network(SAON) becomes a promising paradigm. In this paper, the related space optical communications and network programs around the world are first briefly introduced. Then the intelligent Space All-Optical Network(i-SAON), which can be deemed as an advanced SAON, is illustrated, with the emphasis on its features of high survivability, sensing and reconfiguration intelligence, and large capacity for all optical load and switching. Moreover, some key technologies for i-SAON are described, including the rapid adjustment and control of the laser beam direction, the deep learning-based multi-path anti-fault routing, the intelligent multi-fault diagnosis and switching selection mechanism, and the artificial intelligence-based spectrum sensing and situational forecasting. 展开更多
关键词 Space all-optical network intelligence optical phased array routing network prediction
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Hybrid WDM/TDM PON system employing an all-optical wavelength converter
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作者 何炜 Liu Deming +1 位作者 Qian Yinbo Liu Hai 《High Technology Letters》 EI CAS 2012年第4期371-375,共5页
A new hybrid WDM/TDM passive optical network (PON) implemented by using all-optical wavelength converters (AOWCs) is proposed. The AOWCs are based on the cross-gain modulation (XGM) effect of the semiconductor o... A new hybrid WDM/TDM passive optical network (PON) implemented by using all-optical wavelength converters (AOWCs) is proposed. The AOWCs are based on the cross-gain modulation (XGM) effect of the semiconductor optical amplifier (SOA). Moreover, the feasibility of this sys- tem is experimentally demonstrated by evaluating the impacts of the optical wavelength conversion, time domain waveforms, eye diagrams and bit-error-rate (BER) in AOWC. The results show that the proposal will be a promising solution for the next generation access networks. 展开更多
关键词 passive optical network (PON) wavelength division multiplexer (WDM) all-optical wavelength converter AOWC) cross-gain modulation (XGM)
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基于POL的智慧园区全光网络建设研究
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作者 陈晨 《科技创新与应用》 2024年第23期132-136,共5页
通过对以太全光网和无源光局域网POL 2种组网技术的对比分析,提出园区全光网络建设方案,详细说明其设计及部署方式,并进一步介绍微管微缆气吹施工工艺在园区全光网络建设中的应用。
关键词 智慧园区 全光网络 无源光局域网 pol 微管微缆
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基于POL技术的全光校园网设计与实现 被引量:1
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作者 钟文基 王丽磊 《现代信息科技》 2023年第8期26-28,32,共4页
近年来,行业的智能化和信息化呈现加速发展趋势,高清视频会议、云服务、移动办公等应用的需求日益增多。与此同时,带宽升级、三网融合等网络新要求也变得越来越迫切,介质升级成为企业解决网络难题的一个新选择。POL全光网络传输性能强... 近年来,行业的智能化和信息化呈现加速发展趋势,高清视频会议、云服务、移动办公等应用的需求日益增多。与此同时,带宽升级、三网融合等网络新要求也变得越来越迫切,介质升级成为企业解决网络难题的一个新选择。POL全光网络传输性能强、架构简单、部署便捷、升级扩容灵活,作为面向未来的基础网络设施,为新一轮的应用场景带来发展契机。文章以广西水利电力职业技术学院POL全光校园网设计与实现为例,深入剖析POL技术的典型应用。 展开更多
关键词 pol技术 全光校园网 设计与实现 实践应用
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Wavelength Routing Algorithmof All Optical Network Based on Traffic Engineering
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作者 GUO Ai-huang LIAO Shu-yan 《Semiconductor Photonics and Technology》 CAS 2006年第1期47-50,共4页
General multi-protocol label switching(GMPLS) based on traffic engineering is one of the possible methods to implement all-optical network. This method implements the network with IP technique and guarantees the quali... General multi-protocol label switching(GMPLS) based on traffic engineering is one of the possible methods to implement all-optical network. This method implements the network with IP technique and guarantees the quality of service with traffic engineering. Based on the establishment of selecting schemes of optical path and methods of traffic calculation, the wavelength routing algorithm of all-optical network based on traffic engineering is presented by combining with prior route of shortest path and traffic engineering, the algorithm procedures are given, and the actual examples are introduced as well as the analysis on simulation calculation. This research results have certain significance for the achievement of optical switching technique of all-optical network. 展开更多
关键词 Traffic engineering all-optical network Wavelength routing algorithm
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Swarming Computational Approach for the Heartbeat Van Der Pol Nonlinear System
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作者 Muhammad Umar Fazli Amin +4 位作者 Soheil Salahshour Thongchai Botmart Wajaree Weera Prem Junswang Zulqurnain Sabir 《Computers, Materials & Continua》 SCIE EI 2022年第9期6185-6202,共18页
The present study is related to design a stochastic framework for the numerical treatment of the Van der Pol heartbeat model(VP-HBM)using the feedforward artificial neural networks(ANNs)under the optimization of parti... The present study is related to design a stochastic framework for the numerical treatment of the Van der Pol heartbeat model(VP-HBM)using the feedforward artificial neural networks(ANNs)under the optimization of particle swarm optimization(PSO)hybridized with the active-set algorithm(ASA),i.e.,ANNs-PSO-ASA.The global search PSO scheme and local refinement of ASA are used as an optimization procedure in this study.An error-based merit function is defined using the differential VP-HBM form as well as the initial conditions.The optimization of the merit function is accomplished using the hybrid computing performances of PSO-ASA.The designed performance of ANNs-PSO-ASA is implemented for the numerical treatment of the VP-HBM dynamics by fluctuating the pulse shape adjustment terms,external forcing factor and damping coefficient with fixed ventricular contraction period.To perform the correctness of the present scheme,the obtained numerical results through the designed ANN-PSO-ASA will be compared with the Adams numerical method.The statistical investigations with larger dataset are provided using the“mean absolute deviation”,“Theil’s inequality coefficient”and“variance account for”operators to perform the applicability,reliability,and effectiveness of the designed ANNs-PSO-ASA scheme for solving the VP-HBM. 展开更多
关键词 Particle swarm optimization van der pol heartbeat system statistical analysis artificial neural networks active-set algorithm numerical computing
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A novel data channel fault detection mechanism in optical burst switching networks
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作者 常交法 Wang Ruyan +3 位作者 Long Keping Yang Xiaolong Lv Kewei Duan Zhenying 《High Technology Letters》 EI CAS 2007年第3期307-311,共5页
Fault detection in optical burst switching (OBS) networks will be a challenging task in the future. A novel mechanism based on probe burst (PB) and a new key concept is proposed to detect faults of OBS networks by... Fault detection in optical burst switching (OBS) networks will be a challenging task in the future. A novel mechanism based on probe burst (PB) and a new key concept is proposed to detect faults of OBS networks by sampling the health of data channels, which solve the difficulty of optical monitoring schemes while keeps the transparency of data network to Internet protocol (IP) packets. It takes full advantage of the characteristics of OBS, including architecture and signalling scheme, and introduces the excellent performances of single-hop-test used in electrical communication networks into OBS environment while avoids the shortcoming that any optical burst must undergo an optical-electric-optical (OEO) conversion. Well designed PB can provide exact criterion for judging whether protection/restoration should be excuted according to hard or soft fault identification. 展开更多
关键词 optical burst switching (OBS) fault detection fault management all-optical network probe burst(PB)
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A Novel Optical Control Plane for Switching an Electro-Optical Hybrid Node in Translucent WDM Optical Networks
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作者 Sridhar Iyer Shree Prakash Singh 《Communications and Network》 2013年第1期57-68,共12页
In a translucent network scenario, development of an optical control plane (OCP) that is aware of the location and number of available regenerators and all-optical wavelength converters (AOWCs) is of paramount importa... In a translucent network scenario, development of an optical control plane (OCP) that is aware of the location and number of available regenerators and all-optical wavelength converters (AOWCs) is of paramount importance. However, current generalized multiprotocol label switching (GMPLS) protocol suite does not consider the distribution of regenerator and AOWC availability information to all the network nodes. In this paper, we propose a novel optical control plane (OCP) architecture that 1) disseminates information about network components (i.e. regenerators and AOWCs) to all the network nodes, and 2) evaluates candidate routes which use fewest amounts of network components. Performance of the proposed OCP is compared with a recently proposed hybrid OCP approach in terms of blocking performance, number of deployed components and lightpath establishment setup times. The obtained simulation results show that the proposed OCP approach demonstrates low connection blocking and establishes lightpaths by 1) minimizing the overall network cost owing to the deployment of minimum total number of network components, and 2) demonstrating acceptable lightpath establishment setup times at all traffic loads. Further, the proposed OCP methodology is compatible and suitable for controlling the operations of a novel electro-optical hybrid translucent node which is a latency efficient technology capable of delivering a cost effective implementation suitable for large scale deployment. 展开更多
关键词 OPTICAL Control Plane TRANSLUCENT WDM OPTICAL network Physical Layer IMPAIRMENTS Regenerators all-optical Wave-Length Converters GMPLS PLI-SQARWA
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多校区全光局域网(POL)统一接入管理研究——以广东工程职业技术学院全光校园网络部署为例
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作者 李锋 朱靖 +1 位作者 李旭斌 林俊发 《数字通信世界》 2023年第12期32-34,共3页
文章创新性地提出软件定义局域网(SD-LAN)方式,将多个孤立校园局域网虚拟成一个完整的局域网。该方式既能根据管理需要设置灵活管理策略,又能兼容原有网络部署,最大程度保护原有投资。
关键词 全光局域网(pol) 软件定义局域网(SD-LAN) IP随行 跨校区漫游 归属校区
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POL全光网络加速智慧园区信息化网络升级
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作者 艾炜 《通信电源技术》 2023年第20期210-212,216,共4页
随着信息化的发展,企业网络架构也在不断变革。面对流量和用户快速增长等多重挑战,企业传统交换机的网络架构已经无法满足需求,因此需要引入全新的全光网络组网方式。通过对比分析无源光局域网(Passive Optical LAN,POL)与局域网(Local ... 随着信息化的发展,企业网络架构也在不断变革。面对流量和用户快速增长等多重挑战,企业传统交换机的网络架构已经无法满足需求,因此需要引入全新的全光网络组网方式。通过对比分析无源光局域网(Passive Optical LAN,POL)与局域网(Local Area Network,LAN)的网络架构,阐述POL全光网络的优势与园区场景中2种组网方式的对比,探讨多场景下的全光网络解决方案,为POL全光网络相关领域的发展提供参考。 展开更多
关键词 全光局域网 无源光局域网(pol) 智慧园区 信息化
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Computation at the speed of light:metamaterials for all-optical calculations and neural networks 被引量:6
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作者 Trevon Badloe Seokho Lee Junsuk Rho 《Advanced Photonics》 SCIE EI CAS CSCD 2022年第6期23-43,共21页
The explosion in the amount of information that is being processed is prompting the need for new computing systems beyond existing electronic computers.Photonic computing is emerging as an attractive alternative due t... The explosion in the amount of information that is being processed is prompting the need for new computing systems beyond existing electronic computers.Photonic computing is emerging as an attractive alternative due to performing calculations at the speed of light,the change for massive parallelism,and also extremely low energy consumption.We review the physical implementation of basic optical calculations,such as differentiation and integration,using metamaterials,and introduce the realization of all-optical artificial neural networks.We start with concise introductions of the mathematical principles behind such optical computation methods and present the advantages,current problems that need to be overcome,and the potential future directions in the field.We expect that our review will be useful for both novice and experienced researchers in the field of all-optical computing platforms using metamaterials. 展开更多
关键词 photonic computing all-optical calculation optical neural network programmable metasurface
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Minimum coding nodes multicast tree for two-channel all-optical network coding scheme 被引量:3
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作者 QU Zhi-Jian BAI Lin ZHANG Li-kun 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2012年第3期114-121,共8页
A heuristic algorithm of establishing a minimum coding nodes multicast tree on which a two-channel all-optical network coding scheme can be performed is presented. To minimize the coding nodes, the heuristic graph-sea... A heuristic algorithm of establishing a minimum coding nodes multicast tree on which a two-channel all-optical network coding scheme can be performed is presented. To minimize the coding nodes, the heuristic graph-search control strategies are investigated. Firstly, a minimum relatedness principle is proposed to balance and minimize the out-degrees of the conventionally directed multicast tree. Secondly, a set of rules about bottom-up path search are presented to recover another path in the conventionally directed multicast tree, and a conflict-backtracking principle is given to minimize the coding nodes in this process. To evaluate the algorithm, some results are given. The results indicate that the algorithm can perform the expected function. Moreover, to further test and verify the algorithm, performances of different multicast modes are compared and analyzed. The results show that the multicast performances will be impaired if a multicast tree contains redundant coding nodes. 展开更多
关键词 network coding multicast tree heuristic algorithm all-optical multicast
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Polarization and wavelength routers based on difractive neural network
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作者 Xiaohong Lin Yulan Fu +3 位作者 Kuo Zhang Xinping Zhang Shuai Feng Xiaoyong Hu 《Frontiers of Optoelectronics》 EI CSCD 2024年第3期17-28,共12页
In the feld of information processing,all-optical routers are signifcant for achieving high-speed,high-capacity signal processing and transmission.In this study,we developed three types of structurally simple and fexi... In the feld of information processing,all-optical routers are signifcant for achieving high-speed,high-capacity signal processing and transmission.In this study,we developed three types of structurally simple and fexible routers using the deep difractive neural network(D2 NN),capable of routing incident light based on wavelength and polarization.First,we implemented a polarization router for routing two orthogonally polarized light beams.The second type is the wavelength router that can route light with wavelengths of 1550,1300,and 1100 nm,demonstrating outstanding performance with insertion loss as low as 0.013 dB and an extinction ratio of up to 18.96 dB,while also maintaining excellent polarization preservation.The fnal router is the polarization-wavelength composite router,capable of routing six types of input light formed by pairwise combinations of three wavelengths(1550,1300,and 1100 nm)and two orthogonal linearly polarized lights,thereby enhancing the information processing capability of the device.These devices feature compact structures,maintaining high contrast while exhibiting low loss and passive characteristics,making them suitable for integration into future optical components.This study introduces new avenues and methodologies to enhance performance and broaden the applications of future optical information processing systems. 展开更多
关键词 Optical difractive neural network all-optical routers polarization degree of freedom Wavelength degree of freedom
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Design of a node architecture for logic-calculation Nased all-optical network coding scheme 被引量:1
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作者 QU Zhi-jian XIE Yin-bao +1 位作者 WANG Ju-hui LIU Xiao-hong 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2013年第5期110-116,128,共8页
Network coding brings many benefits for multicast networks. It is necessary to introduce network coding into optical networks. Nevertheless, the traditional network coding scheme is hard to be implemented in optical n... Network coding brings many benefits for multicast networks. It is necessary to introduce network coding into optical networks. Nevertheless, the traditional network coding scheme is hard to be implemented in optical networks because of the weak operation capability in photonic domain. In the paper, we focused on realizing two-channel network coding in all-optical multicast networks. An optical network coding scheme which can be realized via logic shift and logic XOR operations in photonic domain was proposed. Moreover, to perform the network coding scheme the coding node structure was designed and the operation principle and processes were illustrated in detail. In the end of the paper, the performance and the cost of different all-optical multicast mode were compared and analyzed. 展开更多
关键词 network coding optical logic calculation coding node all-optical multicast
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Network coding based all-optical multicast in WDM networks
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作者 Qu Zhijian Zhang Xianwei +2 位作者 Shi Shaojian Cao Yanfeng Zhao Mingbo 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2015年第1期89-94,共6页
Wavelength division multiplexing (WDM) has been becoming a promising solution to meet the rapidly growing demands on bandwidth. Multicast in WDM networks by employing free wavelength is an efficient approach to savi... Wavelength division multiplexing (WDM) has been becoming a promising solution to meet the rapidly growing demands on bandwidth. Multicast in WDM networks by employing free wavelength is an efficient approach to saving bandwidth and cost. However, the free wavelength may not identical between different hops in a multicast light-path, particularly in heavy load optical WDM networks. In order to implement multicast applications efficiently, a network coding (NC) technique was introduced into all-optical WDM multicast networks to solve wavelength collision problem between the multicast request and the unicast request. Compared with the wavelength conversion based optical multicast, the network coding based optical multicast can achieve better multicast performance with paying lower cost. 展开更多
关键词 NC all-optical multicast WDM networks wavelength conversion
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Application of Automatic Chromatic Dispersion Compensation for Realization of All-Optical Network
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作者 Mikio Yagi Hidenori Koyano +1 位作者 Shiro Ryu Shuichi Satomi 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期579-580,共2页
We have studied the algorithm for the automatic chromatic dispersion compensation using bit error rate (BER) and Q-factor optimization for realization of dynamically reconfigurable all-optical .network. We have made s... We have studied the algorithm for the automatic chromatic dispersion compensation using bit error rate (BER) and Q-factor optimization for realization of dynamically reconfigurable all-optical .network. We have made sure good performance using the compensation system by laboratory experiments. 展开更多
关键词 for on IT In HAVE of Application of Automatic Chromatic Dispersion Compensation for Realization of all-optical network
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基于GPON的全光网络在智慧医院的应用
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作者 袁稷梁 《现代信息科技》 2024年第20期5-9,14,共6页
随着国家医改政策的推进和医院业务信息化的需求日益增长,医院传统网络已不能满足公立医院高质量发展的需要。文章从网络架构、业务、CAPEX资本支出和OPEX运营成本角度出发,首先对传统以太局域网和基于GPON的全光网络进行对比,阐述智慧... 随着国家医改政策的推进和医院业务信息化的需求日益增长,医院传统网络已不能满足公立医院高质量发展的需要。文章从网络架构、业务、CAPEX资本支出和OPEX运营成本角度出发,首先对传统以太局域网和基于GPON的全光网络进行对比,阐述智慧医院POL无源光局域网建设的必要性。其次对智慧医院全光网络组网原理和网络架构进行描述,给出基于GPON技术的全光网络方案,介绍全光网络在智慧医院各业务场景中的应用和全光网络在信息安全的应用情况。最后对POL无源光局域网进行总结并给出建议。 展开更多
关键词 pol全光网络 智慧医院 GPON技术 综合布线 信息安全
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基于支持向量机的舰艇部队作战油料消耗量预测研究 被引量:6
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作者 陆思锡 周庆忠 熊彪 《物流技术》 北大核心 2013年第3期468-470,共3页
为了提高舰艇部队战时油料消耗量预测的准确性,提出了基于支持向量机的预测方法。分析了支持向量机的回归原理及算法,构造了舰艇部队作战油料消耗量预测模型。针对支持向量机中训练参数对预测结果的影响,采用遗传算法对相关参数取值进... 为了提高舰艇部队战时油料消耗量预测的准确性,提出了基于支持向量机的预测方法。分析了支持向量机的回归原理及算法,构造了舰艇部队作战油料消耗量预测模型。针对支持向量机中训练参数对预测结果的影响,采用遗传算法对相关参数取值进行优化,以获得预测性能较好的支持向量机模型。以某舰艇部队参加演习的油料消耗量数据作为实验数据,采用构建的支持向量机模型对舰艇部队油料消耗量进行预测,并将其与BP神经网络进行对比分析。实验结果表明,支持向量机比BP神经网络预测精确度更高,误差更小,有效提高了舰艇部队作战油料消耗量预测的准确性和可靠性。 展开更多
关键词 舰艇部队 油料消耗 支持向量机 遗传算法 神经网络
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