最新刊期
      卷 ， 期 2 ， 1991
      • Li Yong
        Issue 2, Pages: 1-8(1991) DOI: 10.13756/j.gtxyj.1991.02.001
        摘要：This paper has discussed FDM-DPSK scheme as a supervisory transmitting method for 5B6B optical fiber communication system. The transmitting mode of supervisory channel has been established, and its nonlinearity and the noise characteristics have been analyzed. The experiment has been made with the transmitting mode in 140 Mbit/s optical fiber communication system. The results were basically coincided with the theoretical analysis.  
          
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      • Issue 2, Pages: 8(1991) DOI: 10.13756/j.gtxyj.1991.02.002
        摘要：<正> 邮电部科技司于1991.4.12～13对武汉邮电科学研究院研制的部重点科研项目GD/MF565H—Ⅰ光纤线路复用终端机进行了鉴定。国家科委成果办、邮电部光通信领导小组办公室、邮电部电信总局、中国邮电工业总公司、东南大学、北京邮电学院等18个单位的专家、教授参加了鉴定会。代表们本着严谨、认真、实事求是的科学态度对该设备的各项技术指标进行了测试,并对研制单位提交的鉴定资料进行了审查。  
          
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      • Tian Liren
        Issue 2, Pages: 9-15(1991) DOI: 10.13756/j.gtxyj.1991.02.003
        摘要：This paper discusses the necessity for Automatic Protective Switching System, and its configuration, function as well as the operational program are also described in detail.  
          
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      • Chen Weiyou Hu Lizhong Liu Shiyong
        Issue 2, Pages: 16-22(1991) DOI: 10.13756/j.gtxyj.1991.02.004
        摘要：This paper presents a driving circuit for OEIC transmitter capable of not only signal reshaping but also high speed modulation. It can be developed on our current techology condition,and with high stability even when the condition of the fabrication is changed. The CAA of driving circuit shows that the rise and fall time is 120 ps and 140 ps respectively.  
          
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      • Luo Jie Lei Daoyu Zhou Lingshen
        Issue 2, Pages: 23-31(1991) DOI: 10.13756/j.gtxyj.1991.02.005
        摘要：In recent years, An increasing attention has been drawn to using Erbium-Doped Fiber Amplifiers （EDFAs） as new devices for optical communication at 1.5μm communication window.In Gbit/s long link transmission experiment, EDFAs have been used as power amplifiers,in-line repeaters or preamplifiers.In this paper, the fundamental principle of EDFAs is introduced,The progress ang the recent outcomes of the research activities are reviewed.  
          
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      • Ke Taichun
        Issue 2, Pages: 32-37(1991) DOI: 10.13756/j.gtxyj.1991.02.006
        摘要：In this paper, the best structure parameters of the fiber preform have been calculated by computer and the results have been discussed.  
          
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      • Hu Taiguang Hu Hanwu
        Issue 2, Pages: 38-42(1991) DOI: 10.13756/j.gtxyj.1991.02.007
        摘要：This paper introduces in detail the theory and experiment of the direct coupling of optical fibers with waveguides. The total fiber-waveguide-fiber insertion loss of 2.5 dB is reported, and some existing problems are discussed.  
          
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      • Chen Youming
        Issue 2, Pages: 43-50(1991) DOI: 10.13756/j.gtxyj.1991.02.008
        摘要：By sorting out the actual data obtained from the test on the optical cable communication projects,the quantitative relation between the transmission loss and the variation of temperature of overhead MM GI optical cables has been described.  
          
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      • Hu Zhanhong Deng Sanxiang
        Issue 2, Pages: 51-57(1991) DOI: 10.13756/j.gtxyj.1991.02.009
        摘要：The loss of SM Optical fiber, the distribution curve of the attenuation along the fiber length, locating of fiber fault and the splicing loss have been measured and analyzed with OTDR method. In this article, the influences of the mode field diameter, the cutoff wavelength and the relative refractive index difference on the OTDR curve are also verified.  
          
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      • Issue 2, Pages: 58-61(1991) DOI: 10.13756/j.gtxyj.1991.02.010
        摘要：<正> 为适应江苏、浙江两省的经济发展和对通信的要求,两省邮电管理局决定建设杭州—余杭—桐乡—嘉兴—平望—苏州以及桐乡—海宁光纤通信工程。本工程主体工程是杭州—嘉兴—苏州,近期建设一主一备34Mbit/s的数字光通信系统,全长约180km。工程经招标确定,光纤光缆和光、电端机全部采用武汉邮电科学研究院的产品。工程在使用设备数量、传输电路容量和覆盖范围等方面,系我国目前规模最大的全国产化实用光通信工程。  
          
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