全光网络迂回路由的算法及性能分析

分别对波长通道（ＷＰ）和虚波长通道（ＶＷＰ）两种机制的全光网络迂回路由算法的阻塞性能进行了数值分析，并给出了一个任意拓扑全光网络的计算机数值模拟，对比了两种机制的网络阻塞性能。     

ASON光网络中的全光波长变换技术

作为自动交换光网络（ASON）中的核心器件,全光波长转换器在网络中发挥着重要作用.本文简述了波长变换器在全光通信网中的作用和研究意义,讲解了各种波长变换器的原理、结构和所用器件,并分析了它们各自的优缺点.     

波长转换技术及其对光网络性能影响的研究

研究了 WDM光网络节点的组成结构 ,光联网是通过可重构的选路节点建立端到端的“虚波长”通道来实现源和目的之间端到端的光路连接的 ,而波长变换器又是实现虚波长通道的根本途径。在介绍了几种波长转换器结构的基础上 ,着重对比研究了波长转换技术对光网络组网的灵活性、节点操作的复杂性方面的影响。可见使用波长转换技术能充分利用有限的波长资源 ,提高波长重用效率 ,降低网络的阻塞率     

高速全光波长变换器的实现方案及特性分析

探讨了几种高速全光波长变换器的具体实现方案，并对比分析其不同特性，指出主流发展方向，对全光波长变换器的设计及研究有较高指导意义。     

高速全光波长变换器的实现方案及特性分析

探讨了几种高速全光波长变换器的具体实现方案,并对比分析其不同特性,指出主流发展方向, 对全光波长变换器的设计及研究有较高指导意义。     

基于半导体光放大器交叉增益调制的全光波长变换器啁啾特性分析

本文分析了基于半导体光放大器，交叉增益调制机理的全光波长变换器转换信号啁啾随探测光功率的增加而减小的原因，给出了设计最佳全光波长变换器的方法。     

采用SOA-Sagnac光纤干涉仪的AOWC研究与实验

对采用SOA—sagnac光纤干涉仪的全光波长变换器(AOWC)从理论上进行了较为详细的研究，首次根据光路合成法求出SOA—Sagnac光纤干涉仪的响应函数。并构成了一套实验系统，测量了SOA的增益、带宽与输入光功率的关系，测量了输出信号的消光比以及输入、输出信号的波形和眼图。并对它们进行了比较。     

全光网络中的波长变换技术

1光网络中的波长变换技术在全光网络中,波分复用光交换是必不可少的,而波长变换则是实现波分复用光交换的关键技术之一。波长变换器(WavelengthConverter,WC)是解决全光网络中波长路由竞争的关键器件,是充分发挥WDM网络宽带资源的必要手段。波分复用光交换现用的波长变换器只能     

SOA-XGM全光波长变换器的特性分析

对基于半导体光放大器交叉增益调制实现的全光波长变换器的工作特性进行了分析，归纳了要取得较好的变换效果，应在输入信号光功率、波长、偏置电流、放大器腔体长度等方面作合理的选择，使输出信号的消光比、信噪比等指标符合要求。     

相位编码全光AND逻辑门的研究

基于SOA-MZI波长变换器实现OOK格式信号的相位编码,同时利用半导体光放大器的简并四波混频效应提出了相位编码逻辑与门的实现方案。利用半导体光放大器的分段模型对提出的方案进行了仿真验证,结果表明提出的方案能够实现相位编码信号的全光逻辑与操作。     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

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