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0.6μm CMOS Laser Diode Driver for Optical Access Networks
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作者 梁帮立 王志功 +3 位作者 田俊 夏春晓 章丽 熊明珍 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2003年第10期1021-1024,共4页
Using native CMOS technology,EDA tool,and adopting full-custom design methodology,a laser diode driver for the use of STM-1 and STM-4 optical access network,is realized by CSMC-HJ 0.6μm CMOS technology to modulate la... Using native CMOS technology,EDA tool,and adopting full-custom design methodology,a laser diode driver for the use of STM-1 and STM-4 optical access network,is realized by CSMC-HJ 0.6μm CMOS technology to modulate laser diodes at 155Mb/s (STM-1),622Mb/s (STM-4) with adjustable modulation current from 0 to 50mA for an equivalent 50Ω load.The maximum modulation voltage is over 2.5V pp corresponding to a 3V DC bias for output stage.The time range of rise and fall from 360ps to 471ps is measured from the output voltage pulse.The RMS jitter is no more than 30ps for four bit rates.The power consumption is less than 410mW under a power supply voltage of 5V.According to the experimental results,the laser diode driver achieves the same level as their counterparts worldwide. 展开更多
关键词 laser diode driver CMOS optical access networks
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Implementation of access controller for Ethernet passive optical network 被引量:2
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作者 邹君妮 陈健 林如俭 《Journal of Shanghai University(English Edition)》 CAS 2006年第5期425-430,共6页
This paper presents the design and implementation of access controller used for Ethernet passive optical network ( EPON). As a first step to develop an ASIC product, the entire system is designed on a field programm... This paper presents the design and implementation of access controller used for Ethernet passive optical network ( EPON). As a first step to develop an ASIC product, the entire system is designed on a field programmable gate array (FPGA) with an embedded CPU. To reduce working frequency of the FPGA, the byte-to-word conversion is proposed. Propagation delays are equalized by ranging procedure so as to avoid data collision. Implementations of synchronization, classification, as well as Linux porting are illustrated in detail. The interface between the FPGA and CPU are also presented. Experimental results show that the proposed system can properly function in a relatively low cost FPGA. 展开更多
关键词 Ethernet passive optical network broadband access field programmable gate array embedded system.
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Next Generation Optical Access Network Using CWDM Technology
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作者 Saba Al-RUBAYE Anwer AL-DULAIMI Hamed Al-RAWESHIDY 《International Journal of Communications, Network and System Sciences》 2009年第7期636-640,共5页
We are developing a novel technology for the next generation optical access network. The proposed archi-tecture provides FTTX high bandwidth which enables to give out 10Gbit/s per end-user. Increasing the subscribers ... We are developing a novel technology for the next generation optical access network. The proposed archi-tecture provides FTTX high bandwidth which enables to give out 10Gbit/s per end-user. Increasing the subscribers in the future will cause massive congestion in the data transferred along the optical network. Our solution is using the wavelength division multiplexing PON (CWDM-PON) technology to achieve high bandwidth and enormous data transmission at the network access. Physical layer modifications are used in our model to provide satisfactory solution for the bandwidth needs. Thus high data rates can be achieved throughout the network using low cost technologies. Framework estimations are evaluated to prove the intended model success and reliability. Our argument that: this modification will submit a wide bandwidth suitable for the future Internet. 展开更多
关键词 Passive optical network (WDM-PON) Fibre-to-the-Home (FTTH) optical access network NEXT GENERATION
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Cost Effective Scheme for OLT in Next Generation Passive Optical Access Network Based on Noise Free Optical Multi Carrier
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作者 Rahat Ullah Bo Liu +8 位作者 Qi Zhang Qinghua Tian Amjad Ali Yousaf Khan Feng Tian M.Azam Zia Haseeb Ahmad Lijia Zhang Xiangjun Xin 《China Communications》 SCIE CSCD 2016年第6期76-87,共12页
We propos e a cos t-effective multi-carrier generation technique which minimizes the passive optical access network(PON) costs. In this study replacement of laser array with multi-carrier source at optical line termin... We propos e a cos t-effective multi-carrier generation technique which minimizes the passive optical access network(PON) costs. In this study replacement of laser array with multi-carrier source at optical line terminal(OLT) side in PON is addressed. With 25-GHz frequency spacing, the generated optical multi-carriers exhibit good tone to noise ratio(TNR) i. e. above 20 d B, and least amplitude difference i. e. 1.5d B. At the OLT, multi-carriers signal based multiplexed differential phase shift keying(DPSK) data from all the channels each having 10 Gbps for downlink is transmitted through 25 km single mode fiber. While the transmitted information is retrieved at optical network unit(ONU), part of the downlink signal is re-modulated using intensity modulated(IM) on-off keying(OOK) for upstream transmission at 10-Gbps. Simulation results are in good agreement with the theoretical analysis, showing error free transmission in downlink and uplink with 10 Gbps symmetric data rate at each channel. The receivedpower, both for uplink and downlink transmission, is adequate for all channels at BER of 10-9 with minimum power penalties. Power budget is calculated for different splitting ratios showing excellent system margins for any unseen losses. The proposed setup provides a cost-effective way minimizing transmission losses, and providing greater system's margin in PON architecture. 展开更多
关键词 differential phase shift keying intensity modulated on-off-keying optical frequency comb generation optical access network
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A passive optical network based on optical code division multiplexing and time division multiple access technology
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作者 张崇富 Qiu Kun 《High Technology Letters》 EI CAS 2007年第3期302-306,共5页
A passive optical network (PON) scheme based on optical code division multiplexing (OCDM) for the downstream traffics is proposed and analyzed in detail. In the PON, the downstream traffics are broadcasted by OCDM... A passive optical network (PON) scheme based on optical code division multiplexing (OCDM) for the downstream traffics is proposed and analyzed in detail. In the PON, the downstream traffics are broadcasted by OCDM technology to guarantee the security, while the upstream traffics pass through the same optical fiber by the common time division multiple access (TDMA) technology to decrease the cost. This schemes are denoted as OCDM/TDMA-PON, which can be applied to an optical access network (OAN) with full services on demand, such as Internet protocol, video on demand, tele-presence and high quality audio. The proposed OCDM/TDMA-PON scheme combines advantages of PON, TDMA, and OCDM technology. Simulation results indicate that the designed scheme improves the OAN performance, and enhances flexibility and scalability of the system. 展开更多
关键词 passive optical network (PON) optical code division multiplexing (OCDM) time division multiple access (TDMA) optical orthogonal code (OOC) optical line terminator (OLT) optical network units (ONU)
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A survey of free space optical networks 被引量:4
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作者 In Keun Son Shiwen Mao 《Digital Communications and Networks》 SCIE 2017年第2期67-77,共11页
Free Space Optical (FSO) networks, also known as optical wireless networks, have emerged as viable candidates for broadband wireless communications in the near future. The range of the potential application of FSO n... Free Space Optical (FSO) networks, also known as optical wireless networks, have emerged as viable candidates for broadband wireless communications in the near future. The range of the potential application of FSO networks is extensive, from home to satellite. However, FSO networks have not been popularized because of insufficient availability and reliability. Researchers have focused on the problems in the physical layer in order to exploit the properties of wireless optical channels. However, recent technological developments with successful results make it practical to explore the advantages of the high bandwidth. Some researchers have begun to focus on the problems of network and upper layers in FSO networks. In this survey, we classify prospective global FSO networks into three subnetworks and give an account of them. We also present state-of- the-art research and discuss what kinds of challenges exist. 展开更多
关键词 Wireless access networks Free space optical networks Free space optical communications network architecture optical wireless networks Satellite networks
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Using CSMA/CD for Ethernet Passive Optical Network (EPON) 被引量:1
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作者 季晓飞 范戈 《Journal of Shanghai Jiaotong university(Science)》 EI 2004年第2期25-28,共4页
Using CSMA/CD for EPON can eliminate the augmentations, such as multi-point control protocol and point-to-point emulation, added to the existing 802.3 architecture due to the incompatibility of PON to Ethernet. Both f... Using CSMA/CD for EPON can eliminate the augmentations, such as multi-point control protocol and point-to-point emulation, added to the existing 802.3 architecture due to the incompatibility of PON to Ethernet. Both full-duplex EPON system and half-duplex EPON system using CSMA/CD were proposed. In the full-duplex EPON, CSMA/CD is used as the upstream MAC protocol. In the half-duplex EPON system, both upstream and downstream traffic contend for the optical channel through CSMA/CD protocol. The upstream lightwave redirection and collision detection techniques were given. By the analysis and simulation, the throughput performance of the half-duplex EPON system is proven to be as well as that of the existing high speed half-duplex Ethernet LAN. 展开更多
关键词 ETHERNET passive optical network carrier sense multiple access optical access network
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Higher Speed Passive Optical Networks for Low Latency Services 被引量:1
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作者 ZHANG Weiliang YUAN Liquan 《ZTE Communications》 2021年第2期61-66,共6页
Latency sensitive services have attracted much attention lately and imposedstringent requirements on the access network design. Passive optical networks (PONs) providea potential long-term solution for the underlying ... Latency sensitive services have attracted much attention lately and imposedstringent requirements on the access network design. Passive optical networks (PONs) providea potential long-term solution for the underlying transport network supporting theseservices. This paper discusses latency limitations in PON and recent progress in PONstandardization to improve latency. Experimental results of a low latency PON system arepresented as a proof of concept. 展开更多
关键词 passive optical networks time-division multiple access wavelength-division multiple access low latency
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Simulation of Optical Packet-Switched Metropolitan Area Network
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作者 朱炳春 贾潞华 +2 位作者 王春华 黄肇明 阎晓光 《Journal of Shanghai University(English Edition)》 CAS 2002年第2期154-157,共4页
This paper introduces architectures of two types optical packet switched metropolitan area networks and their media access control protocols. We have designed related network simulation systems. With these simulation... This paper introduces architectures of two types optical packet switched metropolitan area networks and their media access control protocols. We have designed related network simulation systems. With these simulation systems, the characteristics and performance of the two MANs can be achieved. 展开更多
关键词 optical packet switching media access control (MAC) wavelength division multiplexing (WDM) metropolitan area network (MAN) IP over WDM.
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Traffic Scheduling in WDM Passive Optical Network with Delay Guarantee
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作者 邱绍峰 范戈 《Journal of Shanghai Jiaotong university(Science)》 EI 2005年第3期242-244,259,共4页
WDM passive optical network becomes more favorable as the required bandwidth increases, but currently few media access control algorithms adapted to WDM acc ess network. This paper presented a new scheduling algorithm... WDM passive optical network becomes more favorable as the required bandwidth increases, but currently few media access control algorithms adapted to WDM acc ess network. This paper presented a new scheduling algorithm for bandwidth shari ng in WDM passive optical networks, which provides per-flow delay guarantee and supports variable-length packets scheduling. Through theoretical analysis and simulation, the end-to-end delay bound and throughput fairness of the algori thm was demonstrated. 展开更多
关键词 wavelength division multiplexing passive optical network media access control protocol
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Optical wireless network in home area based on white LED lights
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作者 Wang Rui Duan Jingyuan Shi Ancun Liu Yuliang 《High Technology Letters》 EI CAS 2011年第3期277-284,共8页
A new optical wireless network based on white LED lights in home area is proposed. It is a duplex channel communication system utilizing signal emitters of white LED lights in the downlink and infrared devices in the ... A new optical wireless network based on white LED lights in home area is proposed. It is a duplex channel communication system utilizing signal emitters of white LED lights in the downlink and infrared devices in the uplink. Strategies for the system construction are given. Performance for users' mobile access of different kinds of optical concentrators is investigated. Indoor channel band-width is analyzed considering white LED light distribution, wall reflection, and receivers field of view (FOV). Various modulation methods are discussed. A demo point-to-point system for surfing the net is constructed using a new line code of 4B6B which is developed to stabilize the optical output, and a peak data rate of 1 Mbps is achieved. This system is built into the lighting infrastructure, therefore decreasing the cost and offering a solution for wireless access in places which are sensitive to radio frequency like hospitals. 展开更多
关键词 optical wireless network white LED light optical concentrator mobile access indoor channel bandwidth
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An Arrangement of Channels and Transceivers in Optical Packet Switching Networks
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作者 Ming Hu 《Journal of Electronic Science and Technology of China》 2008年第1期5-9,共5页
Based on a media access and control(MAC)protocol,an arrangement of channels and transceivers in optical packet switching dense wavelength division multiplexing(DWDM)networks is proposed in this paper.In order to r... Based on a media access and control(MAC)protocol,an arrangement of channels and transceivers in optical packet switching dense wavelength division multiplexing(DWDM)networks is proposed in this paper.In order to reduce the cost of nodes,fixed transmitters and receivers are used instead of tunable transmitters and receivers.Two fixed transmitters and many fixed receivers are used in each node in the scheme.The average waiting delay of this scheme is analyzed through mathematics and computer simulation.The result shows that the property of the scheme is almost the same as using tunable transmitter and receiver.Furthermore,if the tuning time of tunable transmitters is taken into account,the performance of the tunable transmitter scheme is poor than this scheme at the average waiting delay and throughput of the network. 展开更多
关键词 Dense wavelength division multiplexing(DWDM) media access and control (MAC) protocol optical packet switching network transmitter and receiverarrangement tuning time.
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The Novel MAC Protocol for Mixed-media PON Access Networks
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作者 HO Jih-Hsin 《通讯和计算机(中英文版)》 2010年第6期71-75,共5页
关键词 MAC协议 PON 网络媒体 接入 混合 无源光网络 介质访问控制 网络带宽
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The Application of Optical CDMA-Based Fiber Radio Networks in Wireless Sensor Networks
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作者 Chao-Chin YANG 《Wireless Sensor Network》 2009年第2期61-67,共7页
One fiber radio scheme using shifted prime codes for interference elimination is proposed for optical code-division multiple-access (OCDMA) network. By taking advantage of the cyclic property of the shifted prime code... One fiber radio scheme using shifted prime codes for interference elimination is proposed for optical code-division multiple-access (OCDMA) network. By taking advantage of the cyclic property of the shifted prime codes in the same code groups, the proposed compact decoder is low cost and suitable to be used in the task manager node in the applications of wireless sensor networks. The performance comparison for sev-eral OCDMA-based fiber radio networks is also given to clarify the advantage of the proposed one. 展开更多
关键词 optical CODE-DIVISION MULTIPLE-access (OCDMA) Passive optical network (PON) Arrayed Waveguide Grating (AWG) PRIME Code
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基于ROF的终端通信接入网切换算法研究
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作者 褚含冰 王礼云 +1 位作者 张娴静 贾更新 《计算机仿真》 2024年第10期210-214,共5页
针对终端通信接入网带宽、资源耗费以及频率等参数难捕捉,导致接入网切换失败率高的问题,提出一种基于ROF的接入网切换算法来实现有效解决。建立切换时网络带宽、资源耗费的代价函数,求解接入网与待接入网间最为合理的代价比例关系。为... 针对终端通信接入网带宽、资源耗费以及频率等参数难捕捉,导致接入网切换失败率高的问题,提出一种基于ROF的接入网切换算法来实现有效解决。建立切换时网络带宽、资源耗费的代价函数,求解接入网与待接入网间最为合理的代价比例关系。为满足接入网络的硬性带宽需求,初始化请求矩阵,计算每次请求时接入网络产生的带宽变化,用于约束切换精准度,将ROF射频信号技术与判决指标相结合,运用ROF查找通信接入网的切换带宽和频率参数,选择最佳切换值,由此实现终端通信接入网有效切换。实验结果表明,所提算法能够运用较少的切换次数实现最佳切换,其不易受环境噪声影响,所需耗用较低。 展开更多
关键词 射频信号光纤传输 终端通信接入网 网络带宽 网络切换
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Low-cost,large-coverage,and high-flexibility coherent PON for next-generation access networks:advances,challenges,and prospects[Invited]
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作者 邢思哲 张俊文 +9 位作者 申王伟 颜安 李国强 孙奥龙 周骥 郭栋 施剑阳 李子薇 沈超 迟楠 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第4期26-35,共10页
Increasing bandwidth requirements have posed significant challenges for traditional access networks.It is difficult for intensity modulation/direct detection to meet the power budget and flexibility requirements of th... Increasing bandwidth requirements have posed significant challenges for traditional access networks.It is difficult for intensity modulation/direct detection to meet the power budget and flexibility requirements of the next-generation passive optical network(PON)at 100G and beyond considering the new requirements.This is driving researchers to develop novel optical access technologies.Low-cost,wide-coverage,and high-flexibility coherent PON is emerging as a strong contender in the competition.In this article,we will review technologies that reduce the complexity of coherent PON(CPON),enabling it to meet the commercial requirements.Also,advanced algorithms and architectures that can enhance system coverage and flexibility are also discussed. 展开更多
关键词 access network coherent optics flexible data rate low complexity wide dynamic range
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GPON和XG-PON在广电接入网中的应用 被引量:1
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作者 李跃明 《电视技术》 2024年第7期177-181,共5页
当前,中国广电正在努力提升自己在媒体领域和通信市场的竞争力。为支撑业务发展,广电接入网将逐步从多方案统一到光纤到户(Fibre To The Home,FTTH)无源光网络(Passive Optical Network,PON)的路线上。同时,在数据流量持续增长的趋势下... 当前,中国广电正在努力提升自己在媒体领域和通信市场的竞争力。为支撑业务发展,广电接入网将逐步从多方案统一到光纤到户(Fibre To The Home,FTTH)无源光网络(Passive Optical Network,PON)的路线上。同时,在数据流量持续增长的趋势下,广电接入网的部署既要满足现在的客户需求,更要前瞻布局未来。吉比特无源光网络(Gigabit Passive Optical Network,GPON)和非对称10G GPON(10-Gigabit Passive Optical Network,XG-PON)技术基于带宽、覆盖范围、服务质量以及技术升级等优势,在广电接入网的发展中具备应用潜力。基于此,介绍、分析GPON和XG-PON技术,借鉴其他三个运营商的接入网部署经验,为广电接入网的发展提供一定参考。 展开更多
关键词 广电网络 吉比特无源光网络(GPON) XG-PON 接入网 光纤到户(FTTH)
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广播电视宽带网络光纤入户方案设计及技术分析
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作者 赵月梅 《电视技术》 2024年第1期118-120,共3页
广播电视宽带网络光纤入户方案集成了万兆网际互连协议(Internet Protocol,IP)广播、掺铒光纤放大器(Erbium Doped Fiber Amplifier,EDFA)、分光器、吉比特无源光网络(Gigabit Passive Optical Network,GPON)等关键技术,并将光网络单元O... 广播电视宽带网络光纤入户方案集成了万兆网际互连协议(Internet Protocol,IP)广播、掺铒光纤放大器(Erbium Doped Fiber Amplifier,EDFA)、分光器、吉比特无源光网络(Gigabit Passive Optical Network,GPON)等关键技术,并将光网络单元ONU(Optical Network Unit,ONU)作为关键桥梁实现了光纤网络与用户设备的连接,满足有线直播和互联网视频点播平台的双向传输需求,通过测试验证了方案的可行性。该方案为广播电视宽带网络光纤入户提供了高效可行的解决方案,从而为用户提供了更优质的观看体验和更强大的网络支持。 展开更多
关键词 广播电视 宽带网络 光网络单元(ONU) 光纤入户
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接入网改造中无源光网络技术的分析与应用
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作者 宁伯强 《电视技术》 2024年第1期152-154,159,共4页
接入网改造是“十四五”时期我国网络基础设施升级和改进的基本内容。在当前持续推进的接入网改造中,无源光网络技术的应用愈发普遍,利用该技术对提升接入网的改造效果意义重大。基于此,在概括介绍无源光网络技术的基础上,分析研究无源... 接入网改造是“十四五”时期我国网络基础设施升级和改进的基本内容。在当前持续推进的接入网改造中,无源光网络技术的应用愈发普遍,利用该技术对提升接入网的改造效果意义重大。基于此,在概括介绍无源光网络技术的基础上,分析研究无源光网络技术在接入网改造中的应用方式和应用产生的效果,以期为接入网改造中无源光网络技术的有效应用提供相关参考。 展开更多
关键词 接入网改造 无源光网络技术 网络基础设施
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有线数字电视光纤入户网络设计与实现
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作者 丁传宝 《电视技术》 2024年第8期111-113,共3页
随着数字经济的发展,有线数字电视大幅提升了高清晰度和个性化服务水平。光纤到户(Fibre To The Home,FTTH)技术因其高数据传输速率和大容量特点,成为升级有线电视服务的决定性技术。对此,分析传统的数字电视入户方式,并提出一种基于“... 随着数字经济的发展,有线数字电视大幅提升了高清晰度和个性化服务水平。光纤到户(Fibre To The Home,FTTH)技术因其高数据传输速率和大容量特点,成为升级有线电视服务的决定性技术。对此,分析传统的数字电视入户方式,并提出一种基于“双纤三波”的FTTH网络设计方案。改进方案包括调整硬件配置、优化光学参数等内容,并运用分光系统等技术以实现高效、稳定且清晰的信号传输,满足用户对高质量多媒体服务的需求。 展开更多
关键词 有线数字电视 光纤入户 网络设计
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