EPON技术在有线电视网双向改造中的应用

介绍EPON技术在新建和改建有线电视双向网络中的几种具体应用,在新建小区采用EPON技术组网与HFC网同步建设,在已建小区HFC网改造的同时应用EPON技术组网,并给出具体的设计方案和投资预算,并与CMTS CM技术组网进行了投资和性能的比较,说明在广播电视网EPON技术中应用的优越性.     

EPON技术在有线电视网双向改造中的应用

本文主要介绍了EPON技术对新建和已建的有线电视双向网络的建设和改造中的几种具体应用。对新建小区采用EPON技术组网和HFC网同步建设,对已建小区HFC网改造的同时进行EPON技术组网的应用。除此之外,还与采用CMTS CM技术组网进行了投资和性能的比较,说明采用EPON技术在广播电视网中应用的优越性。     

EPON+EoC在张家港广电的应用

双纤三波EPON是广电双向网中最接近HFC网络的方案,本文介绍新建小区FTTB的EPON组网方案在张家港广电配套小区工程中的实际应用。     

基于HFC网智能小区的系统设计

信息技术在建筑行业的高速发展使得智能住宅和智能小区迅速崛起并成长为巨大的新兴产业,提出一个基于有线电视HFC网构建的数字智能小区系统,省去了综合布线的重复投资,该方案依托成熟的有线电视网技术,可实现智能小区建设所需的安全防范、管理自动化和信息自动化的功能。     

EPON组网模式下的光纤到户智能小区应用策略

现有的小区通信模式和居民需求存在差距,为提升居民网络,通讯以及视频质量,并保障节能,经济实时化的光纤到户目标.本文结合EPON组网模式实现光纤到户智能小区应用策略,首先给出智能用电小区需求和应用目标,进而分析了EPON组网模式下智能小区应用策略,包含用电数据获取和三网融合策略,阐述了EPON组网下光纤到户智能小区特点,并给出智能小区的EPON策略安全监管方案,完成ONU以太网络端口的远程监管,EPON上行和下行安全管理技术以及ONU端口安全监管.     

EPON在住宅小区三网融合中的应用

三网融合背景下,住宅小区的网络连接也要有所变化,打造满足人们需求的新型智能小区。在EPON技术和三网融合理念的基础上提出一种三网融合的住宅小区组网方案,并从EPON技术与其他技术的组合应用方面进行讨论。     

EPON＋EOC技术在广电HFC网中的应用

本文主要介绍利用EPON＋有源EOC组网的技术方案,同现有的HFC网络相结合,实现网络升级,并将现有的HFC网改造成可进行VOD视频点播、宽带上网的双向网。     

EPON与HFC网络的融合及网络接入方式的探讨

介绍了淮南有线电视网络的实际状况，概述了HFC网和EPON网的网络结构。对两者进行简单对比，并着重介绍了EPON网络的优点，肯定了EPON技术在双向网络改造中的应用。提出EPON＋LAN和EPON＋EOC种接入方式。介绍在使用EPON技术进行网络改造初期时，如何将HFC网络同EPON网络进行融合，采用新技术的同时使原有网络设备仍可发挥作用。通过新老技术的结合，达到了拓展有线网络发展途径的目的。     

EPON+EoC双向网技术在有线电视中的应用

本文介绍EPON的工作原理、特点、EPON＋EoC组网方案、及EPON＋EoC技术在HFC网络中的应用     

采用EPON方案建设电子政务承载网

分析了电子政务的需求和组网特点,结合UT斯达康在广电电子政务网建设中的一些项目经验,分析了在电子政务网建设中如何选择合适技术方案,根据EPON方案这几年的应用情况,说明了该方案在运行速度、稳定性、安全性及功能上完全达到电子政务网的设计要求。     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.