最新刊期
      卷 ， 期 2 ， 1997
      • Zhang Xu
        Issue 2, (1997)
        摘要：The paper recommends the three new books edited by Dr.T.P.Lee:“Current Trends in Integrated Opto Electronics”,“Current Trends in Vertical Cavity Surface Emitting Lasers”,“Current Trends in Optical Amplifiers and their Applications”.Firstly,the paper briefly describes the forewords for the three books written dy Dr.Lee.Then,in the following sections,the paper briefly explains the current trends in high bit rate lasers and modulators,vertical cavity surface emitting lasers,laser array for wavelength division multiplex systems,Erbium doped and Praseodymium doped fiber amplifiers and pump lasers,chain operation of optical fiber amplifiers,semiconducter travelling wave optical amplifiers and their applications in photonic switching.  
        关键词：lasers;\ wavelength division multiplex;\ optical fiber amplifiers;\ semiconductor optical amplifiers   
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      • Niu Lixin Yang Jun
        Issue 2, (1997)
        摘要：In this paper, we introduce the techniques of mapping and demapping from E4 to STM 1 which are designed independently by our self. The scheme of the experiment system is presented,key techiques and experiment results are discussed.  
        关键词：mapping;demapping;pointer processing   
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      • Yang Ming Yi Heqing
        Issue 2, (1997)
        摘要：A calculation method of channel bandwidth,equivalent Q factor of timing recevering circuit,gain of limiting amplifier and pattern jitters suppression are proposed in the paper. This paper also describes a new equalizer for high speed and low noise optical receivers.  
        关键词：SDH;\ optical receiver;\ sensitivity   
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      • Zhang Quan\ \ Li Ling\ \ Guo Jianen
        Issue 2, (1997)
        摘要：Fabry Perot filters are major candidates for use as demultiplexers in wavelength division multiplexing systems.In this paper,according to the characteristics of F P filter,we present the model of WDM system crosstalk,and compute the probability of error and power penalty given by crosstalk.  
        关键词：WDM;\ \ crosstalk;\ \ F P cavity optical filter   
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      • Zhang Xueyong\ \ Chen Yongshi
        Issue 2, (1997)
        摘要：Erbium Doped Fiber Amplifier （EDFA） is one of the most important components in optical fiber communication.Computing analysis on the properties based on the theory of EDFA is presented in the paper.Furthermore ,the optimum length of Erbium Doped Fiber（EDF） is studied.The computational values are agree to the experiment results.  
          
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      • Gong Yandong\ \ Guan Yali et al.
        Issue 2, (1997)
        摘要：Nonlinear pulse evolution transmitted in fiber was stimulated through computer.We find that nonlinearity can compress pulse and reduce polarization mode dispersion（PMD）.  
        关键词：fiber;\ polarization;\ dispersion;\ nonlinearity   
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      • Qu Yan\ \ Chen Zhihao
        Issue 2, (1997)
        摘要：We give formulas for espressing a state of polarization of an arbitrarily polarized light on Smith chart which is equivalent to the poincare sphere.The properties of Smith chart are discussed.A QUICK BASIC computer program for drawing the polarization evolution on the Smith chart is described.An example shows the applicaion of Smith chart.  
        关键词：polarization;\ Smith chart;\ computer program   
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      • Xie Yi\ \ Qiu Gang\ \ Zhang Yingyan
        Issue 2, (1997)
        摘要：A method is presented to measure the transmission parameters （dispersion,MFD,cut off wavelength,non linear effective area and so on） of the match cladding single mode optical fiber synthetically.It depends on the curve of the index profile measured by a Refractive Index Profiler,and those parameters are calculated out through data processing and culculation.The new way of the data processing can provide high measurement accuracy.Comparing these calculations with measured results by instruments,the deviation is less than ±2 nm for zero dispersion wavelength λ 0,and less than ±0.2 μm for MFD.  
        关键词：radium refractive index profile;\ \ dispersion;\ mode field diameter.   
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      • Liu Xianbing Zou Linsen
        Issue 2, (1997)
        摘要：The operating principle of dispersion compensator with linearly chirped optical fiber grating structure has been explained by a simple physical model. On the basis of the coupled mode theory, we have derived the basic equation of optical fiber gratings. By this equation, we have calculated the response characteristic of linearly chirped optical fiber gratings.  
        关键词：optical fiber grating;dispersion compensation;linearly chirp grating   
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      • Liu Yonghong\ \ Huang Dexiu
        Issue 2, (1997)
        摘要：When excimer Laser irradiate phase masks,the periodic fringe patterns are formed in near field,exposing fibers to it,in core gratings can be induced.In this paper,according to spectrum theories of diffraction,we access the near field intense distributions produced by a periodic mask exposed using an quasimonochromatic excimer laser with a certain divergence,the influence of beam divergence and phase mask characterization on the intense distribution and production of fiber grating is analysized.Results is compared with experiment.  
        关键词：phase mask;\ fiber grating;\ near field intense distribution   
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      • Zou Linsen et al.
        Issue 2, (1997)
        摘要：ed\ \ We have deduced basis of theory to fabricuting optical fiber gratings using phase mask technique from physics and mathematics,and given some useful formulas in phase mask technique for writing optical fiber gratings,while responsed practical results of phase mask technique for writing optical fiber gratings.  
        关键词：phase mask technique;\ \ optical fiber gratings;\ \ intensity   
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      • Liu Qiuhua\ \ Yao Jian\ \ Fang Luozhen
        Issue 2, (1997)
        摘要：In this paper, the operation principle and types of optical attenuator for optical communication were described systematically. The performance and applications of optical attenuators were discussed in detail. At last, the development of optical attenuator was given.  
        关键词：optical attenuator;\ optical passive device;\ optical communication   
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      • Bao Shiping Huang jianguo\ \ Pan Yousin
        Issue 2, (1997)
        摘要：The fiber ribbons for 4,8,and 12 fiber core are manufactured by using 250 μm normal fiber.We understanded that the optical property of fiber ribbon is dependent on coating structure,coating material and coating thickness by a mass of tests and measurements.The manufacturing process of fiber ribbon is determined with current manufacting condition.  
        关键词：fiber ribbon;\ \ optical cable;\ \ fiber coating   
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