最新刊期
      卷 ， 期 5 ， 2002
      • ZHAO Ji-jun,SUN Yong-mei,JI Yue-feng,XU Da-xiong
        Issue 5, Pages: 1-3(2002) DOI: 10.13756/j.gtxyj.2002.05.001
        摘要：In this paper, we analyze in detail the infrastructure of ASON firstly, then describes its advantages and technologies to be developed. At last we present the development trend and status in quo of ASON.  
        关键词：ASON;optical transport network;control plane   
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      • ZHU Li-li,HE Yan
        Issue 5, Pages: 4-9(2002) DOI: 10.13756/j.gtxyj.2002.05.002
        摘要：EPON is a broadband access system based on Ethernet technology, with data encapsulated in Ethernet frame structure. Instead of the conventional Ethernet medium access mechanism of point-to-point and shared medium, a new mechanism of point-to-multipoint is put forward, i.e. PON medium. Therefore many complex problems are educed for an EPON system, such as physical medium parameters, encoder/decoder, SerDes, upstream burst communication, etc. This article mainly describes the physical layer structure of gigabit Ethernet. The key technical challenges to be solved for EPON have been investigated in detail, accordingly resolutions for these problems have been given.  
        关键词：gigabit Ethernet;PON;encoder/decoder;SerDes;jitter;upstream burst communication   
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      • GONG Qian,LIN Jin-tong,YE Pei-da
        Issue 5, Pages: 10-14(2002) DOI: 10.13756/j.gtxyj.2002.05.003
        摘要：OADMs provide the functionality to drop and add a certain number of wavelengths at an intermediate location where access to all the propagating optical channels is not required between WDM transmission terminals. The conventional OADM is based on the cascaded demux/mux configuration, but it requires a lot of equipments, is difficult to manage, and is very costly. The AWG-based OADMs use one AWG as both multiplexer and demultiplexer. Two types of such configurations, loop-back configuration and fold-back configuration, have been proposed in this paper.  
        关键词：WDM;optical networks;AWG（Array Waveguide Grating）;OADM（Optical Add/Drop Multiplexer）   
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      • SHI Guo-wu,GUAN Wei-hua,CHEN Zhang-yuan,WU De-ming
        Issue 5, Pages: 15-17(2002) DOI: 10.13756/j.gtxyj.2002.05.004
        摘要：We proposed three schemes of signals rate auto-perception in OTN,presented the difficulties and the solutions,and compared these schemes.  
        关键词：OTN;ASON;signals rate auto-perception   
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      • HU Jun-wu,WU Jian-xue
        Issue 5, Pages: 18-21(2002) DOI: 10.13756/j.gtxyj.2002.05.005
        摘要：RPR（Resilient Packet Ring） is a new kind protocol, proposed for the optimal transport of IP packets and construction of optical Internet, which is being standardizing by IEEE 802.17 working group. The RPR technology and its features are introduced in this paper, and the comparison of several IP transport technologies is also described.  
        关键词：RPR;SDH;Ethernet;optical Internet   
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      • HU Bao-min,LIU De-ming,HUANG De-xiu
        Issue 5, Pages: 22-25(2002) DOI: 10.13756/j.gtxyj.2002.05.006
        摘要：The architecture, research, markets and applications of EPONs are reviewed, and the prospects of EPONs are described too.  
        关键词：EPON;architecture;optical access network   
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      • TIE Rui-jun
        Issue 5, Pages: 26-29(2002) DOI: 10.13756/j.gtxyj.2002.05.007
        摘要：This article analyzes the development status of metropolitan area network （MAN）,expounds the MAN techniques such as 10 GbE, RPR, MPLS and CWDM and their applications in the network.  
        关键词：MAN;Ethernet;RPR;MPLS;WDM   
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      • DIAO Qing-fan
        Issue 5, Pages: 30-35(2002) DOI: 10.13756/j.gtxyj.2002.05.008
        摘要：This paper expounds the current development of 10 Gbit/s Ethernet （10 GbE）,analyzes the technique advantages, economic performance, application conditions and forms of 10 GbE applied in metropolitan area network （MAN）, presents the probable challenges in this application and the solution methods.  
        关键词：MAN;10 GbE;WDM;RPR   
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      • WU Qiang,YU Chong-xiu,LIN Ming,WANG Tian-zhu,ZHENG Wen-xiao,WANG Chuan-lin
        Issue 5, Pages: 36-39(2002) DOI: 10.13756/j.gtxyj.2002.05.009
        摘要：The influences of fiber nonlinear effects on 16×10 Gbit/s system are simulated and studied. From the simulation, the following conclusions are drawn: （1） SPM and XPM effects existing in G.652 fiber are main reasons for the irregular changes of system BER versus the input-fiber-power; （2） if the input-fiber-power is less than 16 dBm and larger than 9 dBm, the system design can be run smoothly.  
        关键词：SPM;XPM;nonlinearity   
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      • YANG Guang-qiang,YANG Xing-yu
        Issue 5, Pages: 40-45(2002) DOI: 10.13756/j.gtxyj.2002.05.010
        摘要：The soliton-effect of picosecond pulse compression in fibers with slowly decreasing dispersion is studied. In this paper, by soluting the nonlinear Schrdinger equation （NLS） including gain effect numerically, we find that good compression effect will be obtained if initial chirp is added on pulse in optical fibers with slowly decreasing dispersion. Furthermore, the effect of initial width of pulse on soliton-effect of picosecond pulse compression is also obvious.  
        关键词：optical fibers with slowly decreasing dispersion;soliton-effect compression;initial chirp   
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      • HUA Ying 1,CHEN Yong-shi 2
        Issue 5, Pages: 46-50(2002) DOI: 10.13756/j.gtxyj.2002.05.011
        摘要：Accurate determination of the nonlinear coefficient of optical fiber is required for the amplified optical transmission systems. The paper introduces several methods for measuring nonlinear coefficient and discusses their merits and demerits.  
        关键词：optical fiber;nonlinear coefficient;test method;SPM;XPM;FWM   
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      • Issue 5, Pages: 50(2002) DOI: 10.13756/j.gtxyj.2002.05.015
          
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      • XIN Yu,YU Chong-xiu,WU Qiang,XIN Xiang-jun,HU Le-hui,YAO De-qi
        Issue 5, Pages: 51-54(2002) DOI: 10.13756/j.gtxyj.2002.05.012
        摘要：Six tuning methods of fiber grating for filter are researched. Their fundamental principles are analyzed. Their respective virtues and shortcomings are also compared.  
        关键词：fiber grating;filter;tuning   
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      • Issue 5, Pages: 55-57(2002) DOI: 10.13756/j.gtxyj.2002.05.013
        摘要：The excursion mechanism of Bragg grating wavelength with strain variation for a fiber grating is analyzed, the influence of strain change on reflection and bandpass is theoretically analyzed, by apllying strain, the dynamic single/dual channel filtering with tunable fiber Bragg gratings is realized.  
        关键词：fiber Bragg grating;strain;dynamic tuning   
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      • TIAN He-bin,YANG Tian-xin,Wang Yong-qiang,Zhou Jia-ning
        Issue 5, Pages: 58-62(2002) DOI: 10.13756/j.gtxyj.2002.05.014
        摘要：The principle, structure and the fabrication process of Er 3+ -Yb 3+ co-doped glass waveguide amplifiers（EDWA） are introduced, along with their advantages and limitations. Several integrated amplifiers based on EDWA and their application to optical communication field such as metro/access, CATV, etc. are also described.  
        关键词：waveguide amplifiers;EDWA;glass optical waveguides)   
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