最新刊期
      卷 ， 期 1 ， 1999
      • Yu Jianguo He Jianming Yi Heqing
        Issue 1, (1999)
        摘要：The significance of OXC and OADM in all optical network is analyzed. It is an effective method to overcome electrical bottle neck problem. A network structure with one OXC node and six OADM nodes is designed .The scheme to solve 4 key technology problems is advanced.  
        关键词：optical cross connects;\ optical add drop multiplexer;\ all optical network   
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      • Yu Jianjun\ \ Guan Kejian\ \ Yang Bojun
        Issue 1, (1999)
        摘要：The numerical and theory models about each section of 10Gbit/s single channel optical communication system are introduced in detail. The model includes optical pulse transmission, initial optical pulse, erbium doped fiber amplifier, electrical and optical filter. The system performance with different duty cycle, position of dispersion compensation fiber and amplifier span is investigated by employing this model. This model and the conclusions obtained by the model can support some help for the further research.  
        关键词：optical communication system;\ numerical simulation;\ duty cycle;\ nonlinear effect   
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      • Tang Jiawu\ \ Zhang Yan’an
        Issue 1, (1999)
        摘要：The STM 16 SOH processing by using PM5312 chips of STM 4 transport terminating transceiver are presented and, in particular, data phase alignments of 4×PM5312 chips on transmission direction which effect the system performance are analyzed in the paper. Furthermore the different solutions and implementations are given and compared with each other in detail. Experimental results show that improvements on system performances are achieved with the optimized circuit structures.  
        关键词：overhead processing;\ phase alignment;\ section overhead（SOH）   
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      • Wang Zhifeng Chang Shiqiang
        Issue 1, (1999)
        摘要：In this article, the author establishes functional architecture model of PDH transport network using generic functional architecture of transport network which is defined in ITU T Recommendation G.805. On this base, combining with the requirement of PDH optical transmission system network management, the author establish management information model of PDH optical transmission system the for the network element view.  
        关键词：PDH;\ information model;\ optical transmission system   
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      • Yang Liu Mao Qian Yan Xiaoping
        Issue 1, (1999)
        摘要：ATM user network interface （UNI） signalling has a OSI layered structure. The paper begins with briefing the architecture of ATM UNI signalling protocols, and the functions of each layer. Then , it describes the divide of the ATM UNI signalling’s functional blocks, and the functions of each block.  
        关键词：ATM;\ UNI;\ signalling protocols   
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      • Liu Jingao\ \ Zhang Chunya\ \ Yin Jieyi\ \ Ying Rendong
        Issue 1, (1999)
        摘要：An interest in MSCM AM VSB CATV system is rising in China. In this paper we presents using EDFA and linearized external modulation for microwave subcarrier multiplexed （MSCM） lightwave system. And we adopt quantitative unconstrained numerical optimization method（simplex method） to optimize some key parameters of the system for the first time. So we provide a general method for MSCM AM VSB CATV system optimization.  
        关键词：MSCM;\ simplex method;\ numerical optimization   
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      • Wang Xiaoming
        Issue 1, (1999)
        摘要：The optical receiver developed by our research institute is presented, described the system construction and design procedures. The receiver has the characteristic of performence stability, broad bandwidth and two type gain contol methods.  
        关键词：CATV;\ optical receiver;\ automatic gain control   
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      • Chen Changying\ \ Dao Yan
        Issue 1, (1999)
        摘要：In this paper, the technical features and application fields of optical wireless LAN are introduced. Different types of network topology of optical wireless LAN and their advantages and shortages are compared. The control protocols which related to optical wireless LAN are discussed. At last an example of experimental optical wireless LAN is introduced.  
        关键词：optical communication;\ wireless communication;\ LAN   
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      • Li Hongchang
        Issue 1, (1999)
        摘要：This paper elaborately analyses the applying situation of the EDFA in WDM Long Haul Transmission Systems, and on this basis, several schemes of extending the transmission haul in WDM Systems are given.  
        关键词：WDM;\ gain equaliazation;\ EDFA;\ cascades   
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      • Zou Linsen
        Issue 1, (1999)
        摘要：This paper presents the concept and the cause induced of PMD, and the reason for specified PMD≤0.5ps/km by ITU T. the statistical characteristic of PMD and the effect of PMD on optical fiber communication are introduced.  
        关键词：PMD;\ statistical characteristic;\ optical communication   
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      • Cheng Shuling
        Issue 1, (1999)
        摘要：It is introduced that how to improve the ME99C to accurately measure the bandwidth of large NA multimode fibers at 850nm & 1300nm wavelength. Comparing to the measurement results of PK2500, we discussed the influence of the launch condition to the measurement of multimode fibers bandwidth. Finely, several phenomenon in the experement are analyzed.  
        关键词：bandwidth;\ overfilled launch;\ numerical aperture;\ lightspot size   
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      • Issue 1, (1999)
        摘要：This paper explains how operator efficiency in managing, maintaining and servicing the optical network can be greatly improved by using an integrated approach of information management. The next generation of optical management systems integrates fiber cable monitoring （RFTS） with record databases and with existing or future OSS.  
        关键词：fiber optic network;\ network management;\ remote fiber test   
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      • Issue 1, (1999)
        摘要：本文论述了利用仪表来查找光缆护套对地绝缘不良故障的原理、方法步骤和注意事项。  
        关键词：光缆;护套故障;维护   
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      • Issue 1, (1999)
        摘要：京九线ＳＤＨ设备自１９９６年９月开通接管以来，工程遗留问题多。本人结合设备运用及维护工作中碰到的问题谈几点体会，供大家在维护工作中参考。  
        关键词：SDH设备;维护;管理   
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      • Jang Ying\ \ Pang Chuizhu\ \ Cheng Genxiang\ \ Jian Shuishen
        Issue 1, (1999)
        摘要：This paper briefly describes the good linear relationship of Bragg wavelength variation in the optical fibre grating with temperature and stress shown mainly by the experimental data. It also introdues one temperature compensator which can effectively suppress the shift of optical fibre grating Bragg wavelength with temperature.  
        关键词：grating Bragg wavelength;\ temperature;\ stress;\ temperature compensator   
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