大有效面积非零色散位移单模光纤光缆

ＩＴＵ－Ｔ于１９９６年前制定了三种类型的单模光纤建议,可适用于不同通信场所与要求。但随着掺饵光纤放大器（ＥＤＦＡ）、ＳＤＨ１０Ｇｂｉｔ／ｓ设备以及密集波分复用（ＤＷＤＭ）技术的实用化,这三种光纤已不同程度地限制了新技术、新系统的传输性能、传输速率与传输距离。因此,ＩＴＵ－Ｔ于１９９６年１０月制定了新建议Ｇ．６５５非零色散位移单模光纤光缆的特性。这种光纤可适用于高速率、密集波分复用与大长度中继距离的     

大有效面积非零色散位移单模光纤光缆

】ＩＴＵ－Ｔ于１９９６年前制定了三种类型的单模光纤建议,可适用于不同通信场所与要求。但随着掺铒光纤放大器（ＥＤＦＡ）、ＳＤＨ１０Ｇｂｉｔ／ｓ设备以及密集波分复用（ＤＷＤＭ）技术的实用化,这三种光纤已不同程度地限制了新技术、新系统的传输性能、传输速率与传输距离。因此,ＩＴＵ－Ｔ于１９９６年１０月制定了新建议Ｇ．６５５非零色散位移单模光纤光缆的特性。这种光纤可适用于高速率、密集波分复用与大长度中继距离的光纤通信。本文介绍了汕头奥星光缆厂与康宁公司合作,试制二盘大有效面积非零色散位移单模光纤光缆的情况。     

关于未来高速光通信传输线的设想

我们建议一种新的色散补偿方法，由连接两种在１．５５μｍ工作窗口具有相反非零平坦色散值的色散互补光纤（ＬＤ－ＤＳＦ）作为高速、长距离光纤通信系统的传输媒介，这样的传输线能够有效地抵消传输线的色散和抑制非线性效应。我们设计并用ＭＣＶＤ工艺制备了在１．５５μｍ波长处分别具有±２ｐｓ／（ｎｍ·ｋｍ）色散的这些光纤ＬＤ－ＤＳＦ，连接后其总色散在１．５５μｍ波长处表现出０．０１８５ｐｓ／（ｎｍ２·ｋｍ）低的色散坡度。本文还对不同芯子结构的光纤所具有影响非线性的有效芯子面积（Ａｅｆｆ）进行了研究。     

在793.2km G.652光纤上的10 Gbit/s传输实验

介绍了国内首次在７９３．２ｋｍＧ．６５２光纤上进行的１０Ｇｂｉｔ／ｓ系统传输实验,本次实验使用武汉邮电科学研究院研制的１０Ｇｂｉｔ／ｓＳＤＨ设备,以及１０只ＥＤＦＡ与补偿量为７２０ｋｍ的色散补偿光纤,实验结果表明：在误码率ＢＥＲ＝１０＾－１２接收灵敏度可达到－１８．８ｄＢｍ,传输实验的通道代价为０．４ｄＢ。     

低衰减色散补偿光纤及其应用

本文介绍了用具有大的正常色散单模光纤作色散补偿光纤来抵消１．３μｍ零色散波长传输光纤的反常色散的设计原理。用ＶＡＤ法制作了Δ范围从１．６－３．５ 种ＣＤＦ，并检验了其性能。获得了最大Δ为３．５％的ＤＣＦ，其在１．５５μｍ波长处的最大色数为－１４０ｐｓ／（ｎｍ．ｋｍ）。随着Δ的增大，瑞利散射和缺陷衰减增加，致使传输衰减也增大。     

偏振模色散对光纤通信的影响

本文介绍了什么是单模光纤偏振模色散（ＰＭＤ）及其形成的原因,ＩＴＵ－Ｔ规定ＰＭＤ≤０．５ｐｓ√ｋｍ意味着什么,偏振模色散的统计特性,以及对光纤通信的影响。     

非线性光脉冲在平均正常色散光纤中的传输

最先对非线性归零脉冲在具有平均正常色散光纤中传输进行了数值分析，数值模拟表明即使色散搭配光纤具有平均以散为正常色散，脉宽为２０ｐｓ，重复频率为７．４ＧＨｚ的非线性归零脉冲在色散为－０．５ｐｓ／（ｎｍ．ｋｍ），放大器间距为５４ｋｍ的光纤中传输１０００ｋｍ是可能的。提高入纤功率不能延长脉冲的最大传输距离，这与脉冲在平均色散为反常平均色散光纤中的传输特性相反。     

采用啁啾光栅的色散管理孤子传输

我们采用啁啾光纤光栅（ＣＦＢＧ）补偿１．３μｍＳＭ光纤传输线路的色散以后,成功地以１０Ｇｂｉｔ／ｓ速率进行了３,０００ｋｍ光孤子转输。实验中一个中继间隔由５２ｋｍ左右的１．３μｍＳＭＦ构成,经ＥＤＦＡ放大后采用ＣＦＢＧ进行色散补偿。     

容量超过100Gb／s的越洋波分复用系统

本文综述了实现１００Ｇｂ／ｓ以上容量越洋波分复用（ＷＤＭ）系统的几项主要技术，其中包括新型增益均衡方案、宽带掺饵光纤放大器、发射机端的色散补偿技术和归零制（ＲＺ）调制形式。采用这些新技术，业已成功地证实，３２信道５．３Ｇｂ／ｓ（总容量１７０Ｇｂ／ｓ）ＷＤＭ信号可传输通过９８７９ｋｍ。     

EDFA＋EDM陆上光纤干线通信：进展与对策

本文从国际上的新进展出发，结合我国实际情况，探讨利用标准单模光纤及级联ＥＤＦＡ，实现陆上（包括路－岛及沿海，电中继距离＜９００ｋｍ）高数据率多路波分复用（总数据率１０－２０Ｇｂ／ｓ）光纤通信的战略以及有关色散限制，噪声积累，系统带宽及非线性效应等问题。     

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)

正~~     

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