技术前沿

光电能量转换技术推动光纤供电能量转换技术能使光电转换效率超过50%由于能使光电转换效率超过50%,JDSUniphase的光电能量转换技术使得用激光通过光纤传送电能成为可能,光纤供电需要与周围环境的绝缘。光电能量转换技术目前正应用于3V和5V的砷化镓(GaAs)转换设备,这一技术尤其适合于在高电压、RF/EMI和磁场等使用传统的铜缆相对复杂或不易实施的环境中高成本效益的驱动电器运行。除了能在电磁效应中使能量传输绝图光电能量转换技术推动了采用光纤取代铜缆来输送电能缘,光电能量转换技术带来的高转换效率也使通过光纤给高功耗的电器供…     

西安飞讯开创全光网络时代新纪元 650nm塑料光纤传输系统

＂650nm塑料光纤传输系统＂是国内首次实现以650nm塑料光纤为传输介质的局域网系统,研制出了相应的交换和传输设备。相对于五类线铜缆系统具有传输频带宽、保密性能好、抗干扰能力强、防雷击、重量轻、韧性好、节省铜资源等特点;     

650nm塑料光纤传输系统

“650nm塑料光纤传输系统”是国内首次实现以650nm塑料光纤为传输介质的局域网系统,研制出了相应的交换和传输设备。相对于五类线铜缆系统具有传输频带宽、保密性能好、抗干扰能力强、防雷击、重量轻、韧性好、节省铜资源等特点：相对于石英光纤系统具有施工和连接简便、光源便宜、     

650mm塑料光纤传输系统

"650mm塑料光纤传输系统"是国内首次实现以650mm塑料光纤为传输介质的局域网系统,研制出了相应的交换和传输设备。相对于五类线铜缆系统具     

机载数字音频系统架构及关键要素符合性研究

机载音频系统的通话质量直接关系到飞机的飞行安全,话音信号的清晰度及通话时延会影响到飞行员对话音信号的接收及心理感受。根据机载音频系统最小性能标准要求,给出基于AFDX的机载数字音频系统的整体架构方案,并对该架构下的系统信息处理技术的选择及传输时延进行分析计算,分析表明,该架构设计可以满足机载通信系统的性能要求。提供了相应架构下的数字音频系统关键指标的适航符合性测试方案,为机载数字音频系统的设计研发提供依据。     

650nm塑料光纤传输系统

"650nm塑料光纤传输系统"是国内首次实现以650nm塑料光纤为传输介质的局域网系统,研制出了相应的交换和传输设备。相对于五类线铜缆系统具     

奥创利短波媒介转换器

奥创利公司最近推出其Transoptix系列的最新产品，为用户的点到点快速以太网提供一套经济的、切实可行的光纤到桌面解决方案。TransOptix系列产品所采用的结构可在保护现有的铜缆局域网投资的同时平滑地过渡到以光缆为介质的网络系统。Transoptix系列转换器能够将现有UTP、STP等铜缆上传送的信号转化到可以在多模光纤上传输的光信号，称得上是一组有源的介质转换设备。Transoptix的系列产品可以安装在PC机任何一个可用的ISA或PCI的扩展槽上，并将此转换卡与PC机上现有的10Base－T或IOOBase—T网卡用一根跳线相连即可，不用任何…     

650nm塑料光纤传输系统

西安飞讯开创全光网络时代新纪元"650nm塑料光纤传输系统"是国内首次实现以650nm塑料光纤为传输介质的局域网系统,研制出了相应的交换和传输设备。相对于五类线铜缆系统具有传输频带宽、保密性能好、抗干扰能力强、防雷击、重量轻、韧性好、节省铜资源等特点:相对于石英光纤系统具有施工和连接简便、光源便宜、综     

650nm塑料光纤传输系统——西安飞讯光电有限公司

“650nm塑料光纤传输系统”是国内首次实现以650nm塑料光纤为传输介质的局域网系统，研制出了相应的交换和传输设备。相对于五类线铜缆系统其具有传输频带宽、保密性能好、抗干扰能力强、防雷击、重量轻、韧性好、节省铜资源等特点；相对于石英光纤系统其具有施工和连接简便、光源便宜、综合成本低等特点。     

一种基于LTCC技术的频压转换模块的设计

在机载飞行仪表系统中,参数显示主要为电压信号,实际数据采集过程中需要对非电压信号进行处理。设计的频压转换模块将固定幅值的某频段正弦信号经过转换变成与其频率成线性关系的电压信号,同时采用低温共烧陶瓷(LTCC)技术,在保证转换精度的前提下,实现模块的小型化并提高可靠性。为验证该设计的可行性,搭建试验平台进行测试,结果显示转换精度高,性能稳定可靠,能够满足机载的严苛环境要求。     

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.     

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.     

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.     

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.     

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     

JOURNAL OF ELECTRONICS(CHINA)

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NOTICE OF CHANGING JOURNAL OF ELECTRONICS （CHINA） TO MICROSYSTEMS ＆ NANOENGINEERING

正Journal of Electronics(China)(JE)was founded in 1984,sponsored by the Institute of Electronics,Chinese Academy of Sciences.JE is one of the first English academic journals in China in the field of Electronics and Information technology.The journal was published quarterly since it was launched in 1984 to 2003,then it is published bimonthly till now.During