最新刊期
      卷 ， 期 3 ， 1997
      • Issue 3, Pages: 9(1997) DOI: 10.13756/j.gtxyj.1997.03.004
        摘要：<正> 美国的 WordCom 公司不久前宣布,它将着手兴建一个连接欧洲许多国家的光纤网——泛欧光纤网（pan-European fiber network）。这个光纤网的第一期工程定于1997年底完工,将连接伦敦、阿姆斯特丹、布鲁塞尔和巴黎,投资为2亿  
          
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      • Issue 3, Pages: 62(1997) DOI: 10.13756/j.gtxyj.1997.03.015
        摘要：<正> 1997年8月28日,863-317主题专家组通过了由邮电部武汉邮电科学研究院承担的"863"项目"SDH10 Gbit/s 时分复用系统总体方案研究"的验收。这个总体实现方案达到了"863"合同的要求,并提前半年完成,为下一步开发工作打下了坚实的基础。这是第一个完成的九五计划"863"项目。该项目成果是一个掌握大容量光纤传输实用化技术,确立论证了完整的符合国家相关标准和 ITU-T 相关建议的可实施的 SDH 10 Gbit/s 时分复用光纤传输系统总体实现方案。这个实现方案主要解决已敷设的常规光纤（G.652）传输10 Gbit/s 信号达200 km 时色散影响的问题,并研究在线光纤放大器和再生中继机及其网管功能,此外,也研究了系统的指标和测试方法。系统的实现方案是按照生产的要求来论证、来研究,它面向市场,并在研究过程中,从理论、技术、原材料、工艺、生产、建设、维护、管理等不同角度,都以成果能立即转化为生产力为目标,因此,一旦这个总体实现方案得以实施,则经现场实验证实其实用水平后,能立即转产完成产业化。  
          
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      • Yang Zhu
        Issue 3, Pages: 1-3(1997) DOI: 10.13756/j.gtxyj.1997.03.002
        摘要：The first 10 Gbit/s system transmission trail in domestic in 182.5 km G.655 fiber（non-zero-dispersion fiber）is introduced.The trail used 2 EDFAs without use dispersion compensator,and it has no dispersion penalty in result.It shows that,G. 655 fiber is suitable for the 10 Gbit/s transmission system.In this paper we also anlysis the relationship between the pre-chirp method for system transmtting and zero-disper- sion-point choice,and provide the reference for system project.  
        关键词：non-zero-dispersion fiber;EDFA;pre-chirp   
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      • Mao Suofang Feng Zhixue Sun Jinlun
        Issue 3, Pages: 4-9(1997) DOI: 10.13756/j.gtxyj.1997.03.003
        摘要：First computer modeling method of pointer adjustment jitter and modeling results are presented,then a reducing pointer adjustment jitter method called bit leaking is adopted,and on this basis,the accumulation property of pointer adjustment jitter on PDH signal with the number of SDH network elements is illustrated.  
        关键词：pointer adjustment jitter;desynchronizer;bit leaking;SDH   
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      • Wu Zhihong
        Issue 3, Pages: 10-12(1997) DOI: 10.13756/j.gtxyj.1997.03.005
        摘要：The SDH self-healing ring has now become one important network topolo gy for the synchronous optical transmission network because of its relatively high sur- vivability.The calculation of service capacity of the Self-healing ring is a vital base for the planning of ring network.On the basis of service capacity of the self-healing ring, this paper presents a caculation method of traffic flow,and caculation formula of traffic flow as well as restriction conditions for different self-healing rings are also given.  
        关键词：self-healing ring;service capacity;traffic flow   
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      • Yu Jiajun Yang Bojun Guan Kejian
        Issue 3, Pages: 13-16(1997) DOI: 10.13756/j.gtxyj.1997.03.001
        摘要：The effects of the initial frequency chirp on soliton-effect pulse compressor are numerically analyzed.We show that the effects of the initial frequency chirp on the pulse quality factor can not be neglected.The larger the negative chirp of the initial opti- cal pulse is,the smaller the largest quality factor of the compressed optical pulse is.con- versely the larger the positive chirp of the initial optical pulse is,the larger the largest quality factor of the compressed optical pulse is.The optical fiber loss plays an impor- tant role on the quality of the compressed optical pulse,especially when the soliton order is small,so the fiber loss can not be casually neglected.  
        关键词：frequency chirp;soliton-effect pulse compressor;quality factor   
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      • Lu Yusheng Bi HouJie
        Issue 3, Pages: 17-20(1997) DOI: 10.13756/j.gtxyj.1997.03.006
        摘要：This article analyses the performance of noise and distortion for AM optical fiber systems concisely,an experimental optical fiber CATV system is then introduced.  
        关键词：AM optic fiber system;noise;distortion   
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      • Zhao Yulan Wang Hongxiang
        Issue 3, Pages: 21-26(1997) DOI: 10.13756/j.gtxyj.1997.03.007
        摘要：Both 10 Gbit/s TDM and 4×2.5 Gbit/s WDM are considered to be the cost-effective selection for upgrade 2.5 Gbit/s to 10 Gbit/s,but how to choose one of them in practice is still debatable.This paper compares the 10 Gbit/s TDM and 4×2.5 Gbit/s WDM in different aspects,such as technology maturity,application and cost-ef- fectivity,etc.,and gives out the suggestions according to the practical situation in our country.  
        关键词：WDM;TDM;ADM   
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      • Zou Linsen
        Issue 3, Pages: 27-29(1997) DOI: 10.13756/j.gtxyj.1997.03.008
        摘要：In this paper,we present some characteristics and ideas for dispersion and nonlinear effect in the single mode fibers.  
        关键词：GVD;SPM;nonlinear effect;chirp   
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      • Hu Xianzhi
        Issue 3, Pages: 30-34(1997) DOI: 10.13756/j.gtxyj.1997.03.009
        摘要：This paper introduces the fire retardant mechanism,production process and main properties measurment results of the halogen free fire retardant optical fiber cable sheath material and optical fiber cable.  
        关键词：halogen free;fire retardance;sheath material   
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      • Hu Junliang
        Issue 3, Pages: 35-39(1997) DOI: 10.13756/j.gtxyj.1997.03.010
        摘要：After the descriptions of the structure of control and guide optical fiber ca- ble pack and cable pack windding,the forces applied on the cable are analysed theoretically with the corresponding formulas being given.Based on that,the spool me- chanical structures are analysed according to the mechanical theory of the cylindrical shell and formulas of the relationship between critical load and wall thickness of the spool are derived out.  
        关键词：optical fiber guidance;optical fiber cable pack;spool;critical load   
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      • Zhu Yinian
        Issue 3, Pages: 40-43(1997) DOI: 10.13756/j.gtxyj.1997.03.011
        摘要：It is experimentally proved that the technique of depositing hermetic carbon coatings on surface of optical fiber during drawing process can avoid optical fiber attenu- ation and strength degradation caused by hydrogen and water.Under conditions of rising temperature and hydrogen pressure,when the carbon-coated optical fiber is exposed to hydrogen atmosphere,the optical fiber attenuation characteristics are related to hydro- gen,or th OH formed by the reaction between defects in silica and hydrogen.At the range of 100～150℃,hydrogen diffusion model is,in this paper,described by using the solubility and diffusion coefficient of hydrogen in carbon as well as cylindrical classic dif- fusion theory.  
        关键词：hydrogen diffusion;hermetic carbon coating;reliability   
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      • Zhang Nengchu
        Issue 3, Pages: 44-47(1997) DOI: 10.13756/j.gtxyj.1997.03.012
        摘要：This paper describes and analyzes the communication optical cable quality problems which have been found in some quality inspections.Moreover,some advices are given to enter into the quality of imported fiber,and the final product quality should be paid more attention to.  
        关键词：communication optical cable;quality;tensility;loss   
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      • Gao Honglai Zhang Anmao Yao Jian
        Issue 3, Pages: 48-50(1997) DOI: 10.13756/j.gtxyj.1997.03.013
        摘要：A ST single mode optical fiber connector is reported in this paper.The de- sign principle of the connector is described.The optical characteristics and environmen- tal stabilization of the connector is introduced.The main specifications of the ST con- nector are compared with the same kind of connectors abroad.  
        关键词：connector;ferrule;single mode optical fiber   
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      • Li Guangchen
        Issue 3, Pages: 51-59(1997) DOI: 10.13756/j.gtxyj.1997.03.014
        摘要：<正>概述 1996年是ITU-T各个研究组（SG）上一个研究期（1993一1996年）的最后一年。根据世界电信技术的新形势,ITU一T在1996年6月的世界电信标准会议（WTSC-96,日内瓦）上对研究组的组织机构和  
          
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      • Issue 3, Pages: 60-61(1997)
        摘要：本专栏刊出武汉邮电科学研究院94级硕士研究生的论文摘要。本刊编辑部正进一步组织论文作者,将论文内容整理出精炼的文章,计划在今后几期内发表,供读者参考。  
          
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