最新刊期
      卷 ， 期 1 ， 1995
      • Issue 1, (1995)
        摘要：对武汉邮电科学研究院建院２０年的祝贺和期望张煦（上海交通大学）１９９４年６月１０日，武汉邮电科学研究院庆祝建院２０周年，我因事未能亲自参与盛会，非常抱歉。后承寄赠院史和科技成果汇编各一册，阅后立感武汉院的广大同志们在这短短２０年来确实作出了不少的科技...  
          
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      • Zhang Xiaoguang,Chen Lei
        Issue 1, (1995)
        摘要：The quasi-NLS equation describing propagation of ultrashort pulses in dispersion decreasing fiber is obtained. Using numerical simulation, a complete analysis is made for the generation of soliton trains in such fiber with dual-frequency beat-signal as input. The performance shows quite different when fiber loss is taken into account,so neglect of loss must be cautious.  
        关键词：optical soliton telecommunication;dispersion decreasing fiber;fiber loss   
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      • Mao Qian
        Issue 1, (1995)
        摘要：Types,applications and characteristics of Er-doped fiber amplifiers （ED FAs） are introduced in this paper. Various effects of EDFAs implementation on optical fiber transmission systems and solutions are analyzed in detail.  
        关键词：EDFA;optical fiber transmission system   
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      • Xia Wenjun
        Issue 1, (1995)
        摘要：An accurate model for the Er-doped fiber amplifier（EDFA） is presented. The model is used to achieve the gain of EDFA. The computer resultes are in very good agreement with experimental results. From these fundamentals,including the photon number, Master equation and Personick,theory of optical receiver,the artical analyzes the no.se and sensitivity of receiver using EDFAs.  
        关键词：Er-doped fiber amplifier（EDFA）;excited state absorption;amplimfly spontaneous emission;noise figure   
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      • Wang Jinsong,Tang Weizhong,Zhou Wen et al.
        Issue 1, (1995)
        摘要：This paper reviews the application of WDM in broadband communication networks. The rchitectures and characteristics of the WDM networks are analyzed. Also,several dense WDM network experiments are discussed in detail.  
        关键词：WDM;communication network;collision   
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      • Issue 1, (1995)
        摘要：全球在１９９２～１９９７年期间计划建设５１条光纤海缆线路网美国ＫＭＩ（凯斯勒市场信息研究中心）统计，全球在１９９２～１９９７期间计划建设的光纤海缆线路网多达５１条，其中１５条位于东南亚，９条在大西洋，８条在北欧，太平洋和地中海各有７条，而其余的５条则...  
          
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      • Chen Bin,Li Yulin
        Issue 1, (1995)
        摘要：In this paper, we analyse the requiremints of multimedia communicationand study the implementation of multimedia technology in B-ISDN.  
        关键词：multimedia technology;B-ISDN;ATM   
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      • Deng Ducai,He Shuping
        Issue 1, (1995)
        摘要：In the paper,we describe the results of the resistant transient state nuclear radiation optical fiber prepared by the PCVD process. The fiber is F-doped cladding and the core is pure SiO2 with low OH-- content. It is shown that through the nuclear radiating experiment,minimum transient induced loss is 3. 4dB/m. krad. Several problems on the preparation process is discussed  
          
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      • Issue 1, (1995)
        摘要：简讯应力补偿型应变量子阶结构激光界日本三菱电机丹发了日大幅度提高半导体高速工作特性和可靠性的“应力补偿型应变量子附结构”激光器。其结构是在巨变量子附的附层中加上压缩回安，在势里层中ｍ牌张巨变，再展状生长成分层，成为结梅内匣力补偿。具体地说，就是使用Ｍ...  
          
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      • Wu Zhenying et al.
        Issue 1, (1995)
        摘要：The self-aligned processing technology is adopted to make seperated absorbing ridge waveguide （RWG） light emitting diode,and a λ/4 dielectric film is coated on the front surface to increase spontaneous emitting composition in the light output and fibre coupling efficiency. High power RWG LED made by these technologies has relative small lightbeam divergence angle and more than 20μW light output power, maximum 50μW, are got from the coupled standard single-mode fibre under 25C and 100mA DC drive current. 70 devices are taken to carry out the h fetest under 50,80, 120℃ and 150mA CW drive current, almost 248 500 device hours are tested. According to the life test results,we can get 1. 2×106 h of lifetime under the condition of 25C ambient temperature and 150mA drive current,and the degenerate activated energy is Ea=0. 48eV.  
        关键词：light emitting diode;high power;reliability   
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      • Issue 1, (1995)
        摘要：ＫＤＤ筹建多媒体时代用的国际海底信息高速公路ＫＤＤ为ＺＩ世纪的多媒体时代可以进行国际性远程医疗、海外电视购物、电视娱乐等业务。积极投入国际信息高速公路的建设，预计到２０１０年将投资１万亿日元。（赵玉兰）KDD筹建多媒体时代用的国际海底信息高速公路@赵玉兰...  
          
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      • Ren Ming
        Issue 1, (1995)
        摘要：Several major telecom equipment manufacturers abroad are described in this paper and their policies of manufacturing,R & D and marketing are analyzed. Some examples which are given in the paper may be useful.  
        关键词：marketing policy;telecom market   
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      • Xie Junlin,He Feng,Xu Chao
        Issue 1, (1995)
        摘要：This paper studies the oxidation states of silver by XPS analysis,considerd that silver existed in 0, +1, +2 valence states and the +1 valence silver is beneficial to photochrornic properties. So we make a conclusion that the technological process must be kept in the inert or low oxidative atmosphere.  
          
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      • Issue 1, (1995)
        摘要：光纤环形网在本地市话网中的应用与探讨张志寿（荆州地区邮电局）近几年来，荆州地区邮电局尽管市内电话年年增容，但仍不能满足发展的需要。有不少地方要求成片装机；有的专用网用户提出要和邮电公用网并网运行；有的要增设小交换机；有的要增开分组数据交换业务等。根据...  
          
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