最新刊期
      卷 ， 期 2 ， 1987
      • Tian Liren
        Issue 2, Pages: 1-13(1987) DOI: 10.13756/j.gtxyj.1987.02.001
        摘要：This paper, first describes the overall network structure of a central supervisory system for optical fiber digital communications, then illustrates in detail design principle, system construction, transmission mode as well as operating functions of this system.  
          
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      • Huang Shouhua
        Issue 2, Pages: 14-29(1987) DOI: 10.13756/j.gtxyj.1987.02.002
        摘要：This paper deals with the timing jitter in high speed optical fiber digital communication systems. From the concept of time-varying spectrum, a group general expressions of the jitter spectral densities are proposed, which are applicable to conditions of both arbitrary timing extraction （BPF or PLL, etc.） and arbitrary non-linear circuit （NLC）. Their specific results in the simple timing extraction circuit（STC） condition are compared with those from other deductive methods. It proviues convenience for both comparing the effect of every jitter source in specific circuits and choosing appropriate NLC forms.  
          
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      • Issue 2, Pages: 30-38(1987) DOI: 10.13756/j.gtxyj.1987.02.003
        摘要：This paper briefly describes the construction and functions of the computer-controlled system for MCVD optical fiber preform fabrication with emphasis on the design version of the main computer monitor system, expanded circuit boards and application programs。  
          
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      • Liu Qiyuan
        Issue 2, Pages: 39-44(1987) DOI: 10.13756/j.gtxyj.1987.02.004
        摘要：This paper describes the functions and construction of an instrument for photo—detector characterization. The principle of part of the electronic circuits and design essentials are also discussed.  
          
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      • Sun Xuwen
        Issue 2, Pages: 45-49(1987) DOI: 10.13756/j.gtxyj.1987.02.005
        摘要：In this paper, a new theoretical model is introduced which explains the properties of specific contact resistance Pc of ohmic contact in HI-V group compound semiconductors. Particularly, the mechanism of low pc obtained by RF sputter cleaning on semicoductor surface is analyzed theoretically.  
          
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      • Wang Jiao
        Issue 2, Pages: 50-53(1987) DOI: 10.13756/j.gtxyj.1987.02.006
        摘要：In this paper, encapsulation reliability of LPE system and vacuum effects on wafers are reported. Fabrication of high quality all-metasl-connected LPE equipment is also described.  
          
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      • Issue 2, Pages: 54(1987) DOI: 10.13756/j.gtxyj.1987.02.007
        摘要：<正> 国家计委下达武汉邮电科学研究院的多模石英光纤工业性试验生产线,1985年10月动工兴建,1986年底完工,开始进行工业性试生产。1987年5月19日由国家计委、邮电部和北京、上海、武汉、郑州、候马等地的专家们组成鉴定验收委员会,对该生产线进行验收。一致认为多模光纤工业性试验生产线已达到年产8000km多模光纤的生产能力,并具有增产潜  
          
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