100G WDM/OTN技术及工程设计研究

本文结合通信业务未来对于传送网需求,分析了当前100G WDM/OTN技术主要包含有FEC技术、DSP技术与相干接收技术等技术,并在最后从对100G WDM/OTN输送系统能力的设计、100G网络保护与恢复设计两方面研究了对100G WDM/OTN的工程设计,希望可以为相关人员在未来更好利用此项技术,以及对相关工程进行设计时能够带来一些启发。     

100G WDM/OTN系统关键技术及部署策略探讨

针对未来通信业务对传送网的需求,介绍了100G WDM/OTN系统采用的PM-QPSK技术、相干接收技术、DSP技术、FEC技术等关键技术,分析了这技术对传输性能提升的作用,最后对100G WDM/OTN的部署策略进行了探讨。     

2012年中国联通长途传输网100G WDM系统实验网工程

据了解,2012年中国联通长途传输网100G WDM系统实验网工程主设备采购招标项目包括:100G WDM系统OTM终端复用设备、100G WDM系统ROADM设备、100G WDM系统OA设备。项目分为两包,其中:第一包为天津—济南—青岛,其中济南为ROADM局站。第二包为天津—济南—郑州,其中天津—济南采用OMSP保护技术;全程3波道。     

广西联通二级干线传输网建设40G WDM系统的探讨

通过对广西联通二级干线传输网WDM系统现状和问题进行分析,并结合业务发展需求,提出建设40G WDM系统的必要性。针对当前网络拓扑结构进行了组网探讨,分析了利用现网结构和资源组建40G WDM系统省级干线的可行性,最后提出40×40G WDM系统组网方案。     

高速光传输系统的发展与展望

介绍了当前高速传输系统的现状,详细描述了100G、40G WDM的应用现状和技术发展,针对目前40G WDM的应用情况以及100G WDM的发展方向进行了分析,最后对下一步光网络技术向超100G迈进的发展方向进行了展望     

国内首条100G WDM长途传输系统正式开通运行

由中讯邮电咨询设计有限公司（下称中讯院）承担设计的国内首条100G WDM长途传输系统--2012年中国联通长途传输网100G WDM系统实验网工程,于2013年7月31日正式开通运行,成为国内首个承载100 Gbit/s业务的长途传输WDM系统。     

100G传输系统中的关键技术及解决方案

在介绍100G WDM系统标准现状的基础上,从传输、调制、映射封装、接口等方面阐述了100G WDM系统的关键技术及解决方案,最后重点介绍了100G WDM系统的关键技术的解决方案。     

100G WDM/OTN系统设计中的光功率均衡技术

在研究100G WDM/OTN系统主要参数的基础上,分析了光功率均衡对系统性能的影响,并介绍了现网中光功率均衡的实现方式。     

40GWDM系统的色度色散补偿研究

目前国内外运营商已开始规模建设40G WDM系统,为实现40G WDM系统的超长距传输,应对40G WDM系统的色散补偿做到最优配置。本文在实验室测试数据的基础上,研究出各种色散补偿模块的补偿效果,最后提出40G WDM系统现网应用时色散补偿的一些建议     

100G WDM技术发展及应用策略研究

通过分析100G WDM技术的标准进展,在介绍100G WDM关键技术的基础上,重点研究了100G WDM技术的组网和应用策略,为运营商进行100G部署提供参考。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first