最新刊期
      卷 ， 期 Z1 ， 1994
      • Zhang Xu
        Issue Z1, (1994)
        摘要：The paper describes the applications of optical fiber transmission systems in broadband integrated services digital public communication network （B-ISDN）,in local area and metropolitan area private communication network （LAN/MAN ）, in cable television broadcasting network （CATV）,and in mobile communication cellular network. The peculiarities of these applications are compared, and their differences and development trends are briefly discussed.  
          
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      • Issue Z1, (1994)
        摘要：光纤通信的回顾与展望赵梓森（武汉邮电科学研究院）回顾·Ｃ．Ｋ．Ｋａｏ提出光纤通信是通信技术的重大革命１９６６年英籍华人（现美籍）高银在ＩＥＥＥ杂志上发表论文“光频介质表面波导”一文，提出光纤通信的可能性。其主要成就：（１）用石英制作光纤衰减可达２０ｄ...  
          
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      • Issue Z1, (1994)
        摘要：自由空间数字光交换网络──最新一代的通信交换网络曹明翠（华中理工大学激光技术国家重点实验室）１自由空间光学交换网络的崛起目前已是信息量爆炸的时代，随着科学技术的高度发展，全球的政治、经济、文化和军事的交流，随着光纤进入家庭，进入办公室，建立“高速信息...  
          
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      • Liu Gu
        Issue Z1, (1994)
        摘要：The major telecommunication equipment suppliers over the world developed SDH products during recent years by converging vast investment and man-power, as ITU-T finalized the fundanental recommendations for SDH system. SDH products, as a new generation, will be widely deployed in the telecommunication networks. The hardware of SDH products is more complex than that of the PDH equipments and the software lines of code is much more than that of the PDH supervisory system. In this paper, from practical point of view, introduced briefly on the hardware, software, networking and synchronization technologies which were adopted in SDH products development.  
        关键词：Synchronous Digital Hierarchy;PDH;Telecommunication network   
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      • Mao Qian
        Issue Z1, (1994)
        摘要：In this article,the technical term, difinition and the basic concept used for protection switching of SDH optical transport network are introducde. The types of protection switching and their network configurations,the application of overhead bytes in SDH signals used for protection swicthing,the swicthing object and swicthing command are described in detail.  
        关键词：SDH;Protection switching;Network configuration   
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      • Yu Shaohua,Chang Shiqiang
        Issue Z1, (1994)
        摘要：This paper introduces the main Content and feature of SDH DCC protocol stack,especially CMISE, ROSE, ACSE of the object-oriented application layers, route purameter of network layer and LAPD of data link. The relationship between PDU for each layer is also given,and finally two examples of protocol stack configuration for the network element are presented.  
          
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      • Li Guangcheng
        Issue Z1, (1994)
        摘要：This paper discusses the architecture and basic functional requirements of SDH management system, the information modelization of SDH network resources and the establishment of models.  
        关键词：SDH;TMN;Information model;Managed object;ASN.1   
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      • Yan Dingming,Huang Lifu,Chen Yingdi,Tian Xiaoning,Chao Zongqin,Zhang Mingsheng
        Issue Z1, (1994)
        摘要：In this paper,the essentiality of using fiber optic transmission media for subscriber loop system is first discussed,then, the main contents of the configuration,circuit planning and research of GHS-Ⅰ Fiber Optic Subscriber Loop Transmission System are presented. The testing results show that the equipment was rationally designed with advanced technologies and operated properly. The specifications of the equipment conform to relative CCITT proposals and national standards of China.  
        关键词：fiber optic subscriber loop;FPGA   
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      • Hao Shuyue,Wang Huanxin
        Issue Z1, (1994)
        摘要：SHOT-D4 is a special O/E terminal equipment used for the transimission between SPC S1240 central office and RASM（remote terminal）, which can provide transmission path for the two subscriber distribution frames（i. e. 2 000 lines）. When the communication capacity exceeds 2 000 lines,a larger capacity communication system can be established by the way of building block systems. Furthermore, by using this equipment, the subscriber distribution frame can be easily removde out of the office and used as RASM without the additional investment for switching equipment.  
        关键词：SHOT;SPC;RASM;Transmission path   
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      • Yang Zhuang
        Issue Z1, (1994)
        摘要：This paper described the principle and performance of an ASIC - based clock data recovery module working at the rate of 550～650Mbit/s, which was deployed on Beijing-Shanghai-Guangzhou optical communication project,with the functions of simultaneous two clock and data outputs, and the output clock switch-off, single power source with the power consumption of 2W.  
        关键词：ASIC;clock data;module   
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      • Lu Guoqing,Yang Yigang
        Issue Z1, (1994)
        摘要：This paper presents the design of an automatic service system for voice, information and paging. Its architecture and main perfermance are also described.  
        关键词：automatic service system for voice information and paging;data;signal   
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        发布时间：2023-08-14
      • Zou Linsen
        Issue Z1, (1994)
        摘要：The paper discussed a few attractive questions in design and fabrication of optical fiber cable. These questions are very important and interesting for designer, fabricator, quality inspection department and user of optical fiber cables. The content has practical worth of reference for research and production of optical fiber cable in factory.  
        关键词：design and fabrication of optical fiber cable;optical fiber extra length   
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      • Chen Yongshi,Zou Linsen
        Issue Z1, (1994)
        摘要：This paper describes the operating principles and features of dispersion compensating fibers. Finally, we summarize the hresent status of overseas laboratory research and experiment at work, review and comment on the trendrendsapplications.  
        关键词：Dispersion-compensation technique;Dispersion-compensating fiber   
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      • Li Zhenghuai
        Issue Z1, (1994)
        摘要：In this paper,the use of pulley in fiber/cable manufacturing equipment is introduced,and the relations between the fiber tension and the pulley are described in detail.  
        关键词：optical fiber;tension;pulley   
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      • Wang Wei,Luo Jie,Huang Xuanze,Yang zhu,Zou Linsen,Chen Yongshi
        Issue Z1, (1994)
        摘要：Erbium doped fiber amplifier（EDFA） developed by Optical Fiber and Cable Department of Wuhan Research Institute of Posts and Telecommunication Sciences was used for the experiment on 565Mbit/s fiber optic digital communication system. The repeater spacing can be 190km with BER less than 10-12.  
        关键词：EDFA;fiber optic digital communication;repeater spacing;bit error rate   
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      • Lou Jie,Lei Daoyu,Wu Shujian,Zou Linsen,Wan Wei,Huang Xuanze
        Issue Z1, (1994)
        摘要：The future of the application of erbium doped fiber amplifier is discussed. The principle of amplification by Er-doped fiber is presented. The optimum design of fiber parameters is fulfilled with the three-level energy model of Er3+ ions,and the Er-Al codoped fiber with excellent optical properties are produced by MCVD process.  
          
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      • Wan Yanxiang
        Issue Z1, (1994)
        摘要：This article introduce a new method for the control of loose tube fibre overlength by water temperature and mechanical stretching controlling,which makes up the shortage for sole water temperature method.  
          
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      • Yang Guisheng,Dong Zhijiang,Yang Xinmin,Zhou Ning,Liu Jian,Ma Pan
        Issue Z1, (1994)
        摘要：The key points for DFB laser design and new technigue have been described in detail. Highly stable single logitudinal mode operation 1.55μm distributed feedback laser （DFB） has been developed by means of the two -step liquid phase epitaxy （LPE） and firstorder grating. The epitaxial wafer yield>40 %. Device specifications: the CW threshold current （25°C ） is 20 mA, optical power/facet>10 mW, SMSR is up to 43 dB. spectral width △ν-20dB= 0. 3nm, modulation speed>1. 8GHz. Reliablity test show that:spectrum remains stable at high temperature. Threshold degradation<0. 3 mA/kh at 25°C,this rate correspondsto an estimated lifetime of more than 105 h.  
          
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      • Din Guoqing
        Issue Z1, (1994)
        摘要：The PVS spectra for GaAs、InP、InGaAs、InGaAsP etc. are reported in this paper. The PVS of InGaAsP（at the special component） is compared with its FFT - PL. The limitation and complexity for PVS are analysed and discussed. We show that the tested results can be understood correctly, it is necessary to combine device configuration,epitaxy technology with ECV tests for multilayer heterostructure materials.  
        关键词：PVS;longwave absorption limitation λg;heterostructure materials;FFT-PL   
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      • Shen Feng,Xu Shunchuan,Li Xiaoliang,Yang Guishen
        Issue Z1, (1994)
        摘要：We succesfully developed 1. 48μm high-power GaInAsP/InP lasers by a two -step liquid phase epitaxial growth, the fiber output power is greater than 30mW. The devices are used as pumping light sources of erbium-doped fiber amplifier （EDFA）,a gain of 28dB for small signal was achieved by means of bidirectional pumping method. A stable and reliable performance and better thermal characteristics of the devices were demonstrated during long time operation.  
        关键词：pumping light source;high─power laser   
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      • Huang Xuanze,Wang Wei,Luo Jie,Zou Linsen
        Issue Z1, (1994)
        摘要：Ring SM fiber laser using Er3+-doper fiber is described. When it was pumped by 1. 48μm laser,the tuning range of 30nm （1.5μm～1. 56μm）, max. output power >1mW, and spectral width<2nm have been achieved.  
        关键词：EDF;laser;tuning   
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      • Li Baogeng,Xu Zhitao,Zhao xianming
        Issue Z1, (1994)
        摘要：The dependence of quantum efficiency and response time on the parameters of device structure were disussed in the paper in detail,which provided the basis for the device design scheme was also derived. According to the design,and the scheme, the pianar photodiodes were realized with quantum efliciency over 90% and dark current at 100pA level （- 5 V ）. MTTF （mean time to failure） of the devices is longer than 3 000 h （180°C ） and 500 h（230°C ） at - 10 V bias  
        关键词：Photodiode;Quantum efficiency;Dark current   
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      • Qiu Xiangdong,Wu Yousheng,Du Pujun
        Issue Z1, (1994)
        摘要：In this paper, a coaxial optoelectronic device under the R & D by Wuhan Telecommunication Devices Co. is presented. The structure, workmanship, specifications and the prospects for its application are also outlines.  
        关键词：Optoelectronic devices;Coaxial devices;Combined lens   
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      • Li Tao,Mei Suohai,Liu Wen
        Issue Z1, (1994)
        摘要：In this paper, the design features of 635. 616MHz narrow band SAWF is presented, the lithography,dry etching and the film thickness measuring methods during the fabrication process are mainly discussed,the typical characteristics of the filters show the insertion loss less than 15. 5dB,and Q value more than 600.  
        关键词：surface acoustic filter;IDT;etching   
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      • Fang Luozhen,Xu Yuanzhong,Liu Shuihua
        Issue Z1, (1994)
        摘要：In this paper,a miniature optical isolator was reported. Its insolation is better than 40dB,and insertion loss less than 0. 35dB. And the physical size is minimized. This component can meet the needs for the coupling and package of DFB-LD light source. We introduce its operation principle and the design of its structure, then, its key specifications are discussed.  
        关键词：Semiconductor laser;Light source coupling;Optical isolation   
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      • LIu Qiuhua,Wu Aiqin
        Issue Z1, (1994)
        摘要：This paper presents the operating principle,design methods and experimental results of GSK02 optical variable attenuator. Glass plates deposited with metal through vapor deposition were used as attenuation elements. The continuously variable attenuation along with step attenuation extends the range of attenuation and makes the devicesmore stable.  
          
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      • Xu Yuan,Gao Honglai,Yao Jian
        Issue Z1, (1994)
        摘要：This paper reports the detailed investigations on the composition, shaping process and material sintering of zirconia ceramic ferrule for PC type of fiber optic connectors. It has been found that the new elemental composition in extrusion moulding is epoxy and paraffin. and the precision zirconia ceramic ferrules have been obtained. The results show that the material preparation technology, the size and bending properties of the finished ferrules are satisfactory.  
        关键词：ceramic PC fiber optic connector;zirconia;ferrule   
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        发布时间：2023-08-14
      • Wu Zbongjun
        Issue Z1, (1994)
        摘要：The paper deduces the quantitative calculating formula of the cumulative return loss which is caused by a few insertion pieces in a optical fiber line, and presents the experiment in which the cumulative return loss for from one to ten mechanical splices are measured by the method of OCWR. The experiment results tally with the theoretic values. Furtheymore, the theoretic calculating formula show that the addition of insertion pieces are increased, in this experiment,the curve of the cumulative return loss tends to smooth when the numbers of the splices are >3,which conclusion is in accordance with the results of the theoretic calulation.  
        关键词：return loss;cumulative return loss;insertion piece;optical fiber   
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      • LI Yongqian,M. Haruna,H. Nishihara
        Issue Z1, (1994)
        摘要：The measurements and researches on the loss characteristics of crossed opti cal waveguide are carried out by optimum end-fire coupling method. The characteristic curves of the waveguide loss versus the number of transpositions and crossing angle are drawn out, which conform to the expcted loss characteristics of crossed optical waveguide.  
        关键词：integrated optics;crossed optical waveguide;loss measurement   
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      • Feng Peizhen,Yi Wuxiu Yan Bangxiang,Ai Shiying,Zhang Daming
        Issue Z1, (1994)
        摘要：This paper generally describes the state-of-the-art of the development of fiber optic communications both at home and abroad as well as the status of the development of this new industry in China. The existing problems in the development of optocom industry in China is also discussed. Finally, the proposals on how to further develop China’s fiber op tic communication industry are given in the last part of this paper.  
        关键词：Fiber optic communication industry;Optical cable communication equipment;Active optical devices;Passive optical devices   
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      • Zhang Guohai,Li Xianyuan,Zhao Linji,Li Qiuantao,Huang Dingguo
        Issue Z1, (1994)
        摘要：In this article the technical and economic performance for optical fiber transmission is compared with those of microwave transmission,local cable transmission and PCM transmission,where the incomparable superiority of optical fiber transmission in rural telephone networking is revealed,and measures to further reduce the costs of rural digital opticalcable cornlnunication equipment are introduced.  
        关键词：optical fiber communication;techmical and ecnomic performance;ruralcommunicatun   
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      • Issue Z1, (1994)
        摘要：准确掌握标准做好质量监督抽查工作干宗山（邮电部光通信产品质量监督检验中心）１前言邮电部光通信产品质量监督检验中心是１９９１年按邮电部要求开始筹建，并在１９９３年按国家技术监督局的要求，通过了计量认证和邮电部机构审查。在筹建过程中，我们本着边筹建、边工...  
          
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      • Issue Z1, (1994)
        摘要：高速高效高质量的设计手段──ＣＡＤ１前言以前的产品设计要靠技术人员的手工操作，设计文件的编制和设计思想的验证费工费时，而且受到器件采购的限制，至使产品设计周期非常长。由于试验中需大量改换器件致使库存积压，造成材料浪费。采用计算机辅助设计（ＣＡＤ）手段...  
          
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      • Issue Z1, (1994)
        摘要：ＧＤ（ＧＺ）／ＭＦ３４ＨＬ─Ⅲ光传输设备流水测试线随着光纤通信技术的普及和迅速发展，市场对光纤传输设备的需求与日俱增。为了提高生产效率和产品质量，武汉邮电科学研究院在生产手段改造方面作了大量的工作，先后为ＭＥ５２０Ｂ数字传输分析仪、ＭＳ３７１ＰＣＭ通...  
          
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      • Issue Z1, (1994)
        摘要：表面安装技术（ＳＭＴ）应用简介１什么是ＳＭＴ技术ＳＭＴ是英语ＳｕｒｆａｃｅＭｏｕｎｔ〕ｅｃｈｎｏｌｏｇｙ的缩写，即为表面安装技术，是当代世界上电子行业中最新的电子元器件装联技术。是将电子元器件平卧于印制电路板（ＰＣＢ）之上，不采用传统的“通孔”插装技...  
          
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      • Issue Z1, (1994)
        摘要：嘉兴Ｃ３本地电话网１概况嘉兴市位于长江三角洲南翼，东靠上海，西接浙江省会杭州，南濒杭州湾，北连苏州市。市辖城、郊两区和嘉善、平湖、海盐、海宁、桐乡五县（市），全市总面积３９２０平方公里，人口３２０万，有乡镇１４１个。嘉兴Ｃ３本地电话网采用武汉邮电科学...  
          
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      • Issue Z1, (1994)
        摘要：武汉邮电科学研究院光通信设备在巩义市的应用情况武邮产品技术新，条条银线传佳音。在邮电高起点、新技术、超常规发展之际，迎来了武汉邮电科学研究院建院二十周年。值此，对贵院给予巩义市邮电事业发展的支持、帮助表示衷心地感谢！并对贵院，为发展我国光通信，开拓市...  
          
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