最新刊期
      卷 ， 期 3 ， 1988
      • Bao Zhenwu Wang Peisheng
        Issue 3, Pages: 1-16(1988) DOI: 10.13756/j.gtxyj.1988.03.001
        摘要：This paper reviews the history and status quo of integrated optics technology and gives prospects for its future development. The paper also introduces the material and fabrication processes for making optical waveguides, and the applications of active and passive optical integrated devices and integrated optics in communications.  
          
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      • Chen Zhongping
        Issue 3, Pages: 17-23(1988) DOI: 10.13756/j.gtxyj.1988.03.002
        摘要：Giving considerations to the actual influence caused by factors such as inter-symbol interference and quantum noise, this psper takes the Personick′s Gaussian approximation method as the analysing basis and gives out the sensitivity calculating formula for digital optical receiver when the number of digital optical pulse level is an arbitrary integer and the probability of the pulse level is distributed arbitrarily.  
          
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      • Li Shuxiang
        Issue 3, Pages: 24-29(1988) DOI: 10.13756/j.gtxyj.1988.03.003
        摘要：At first, liquidus compositions of In0.53 Ga0.47 As in the temperature region from650 to 700℃ are calculated using the regular model. Through the experimental regulation,high quality,unintentional-doped ternary alloy of In0.53Ga0.47As lattice-matched to（100） InP substrates has been grown by LPE at temperatures of 653,684 and 701℃, and the carrier concentration, Hall mobility and resistivity of these epilayers have been measured. The epilayer grown at 684℃ has smooth surface morphology, its carrier concentration is 3.7× 1015cm-3, Hell mobility 9.07×103cm2/v.s., resistivity 0.19 Ω-cm at room temperature.  
          
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      • Li Longqin
        Issue 3, Pages: 30-33(1988) DOI: 10.13756/j.gtxyj.1988.03.004
        摘要：In this paper the analytical expression of the saturation power of semiconductor laser amplifiers is derived from the active F-P gain formula. This approach leads to determination of the saturation gain at threshold.  
          
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      • Li Fengchun
        Issue 3, Pages: 34-44(1988) DOI: 10.13756/j.gtxyj.1988.03.005
        摘要：In this paper, the relation between the dipersion formula, the waveguide dipersion and the mode field diameter is derived, based on the scale wave equation. The derivation of formula and the analysis of related parameters are made for the mask method. The errors introduced by mask method are calculated. Finally, the measurement of the chromatic dispersion of single mode fibers by mask method is realized.  
          
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      • Mo Xianfeng
        Issue 3, Pages: 45-47(1988) DOI: 10.13756/j.gtxyj.1988.03.006
        摘要：This paper describes a setup for measuring fiber N.A. by optical spot technique using M416B refractive index analyzer with some additional optical components. By using this approach, large injected optical power, symmetrical circular spot and high definition edge can be obtained.The measured results are in good agreementwith that measured by typical measurement method.  
          
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      • Wu Jun
        Issue 3, Pages: 48-54(1988) DOI: 10.13756/j.gtxyj.1988.03.007
        摘要：The principle of transforming frequency by making use of PLL is formulated in this paper, in which the block diagram of the code generator at 34 Mb/s is given. Moreover, the principle and design of each part of the circuits are briefly introduced.  
          
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