最新刊期
      卷 ， 期 5 ， 2001
      • QIN Tao,ZHANG Han yi,ZHENG Xiao ping,LI Yan he,FENG Fei fei
        Issue 5, Pages: 1-4(2001) DOI: 10.13756/j.gtxyj.2001.05.001
        摘要：We introduce a general model for the calculation of the optical signal to noise ratio （SNR） of the optical cross connection （OXC） in optical networks in this paper. The impact of two power equalization themes on the optical SNR is presented. We also point out the EDFA design principle for optimizing noise character of OXC chains.  
        关键词：OXC;OSNR;EDFA;power equalization   
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      • GUO Wei,JI Yue feng,HUANG Yong qing,REN Xiao min
        Issue 5, Pages: 5-8(2001) DOI: 10.13756/j.gtxyj.2001.05.002
        摘要：The paper introduce some kinds of protection type of optical ring networks and typical unidirectional and bi directional OADM node, the paper also analyses the line protection and channel protection of the optical ring the mix the unidirectional and bi directional OADM node and mixing protection, we also analyzes the integrate control of the node skimpily.  
        关键词：OADM node;optical ring networks;protection of the optical networks   
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      • Lü Yali,LIN Jin tong
        Issue 5, Pages: 9-11(2001) DOI: 10.13756/j.gtxyj.2001.05.003
        摘要：Comparing OTDM to WDM utilizing the theory of queue, we get the conclusion that the former takes more advantage in stay time. Pointing out OTDM and WDM should be combined in futural all optical networks.  
        关键词：OTDM;WDM;macro group effect;all optical networks   
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      • CHENG Zhen jie,YU Chong xiu,XU Da xiong
        Issue 5, Pages: 12-15(2001) DOI: 10.13756/j.gtxyj.2001.05.004
        摘要：This paper summarizes and compares four kinds of bidirectional wavelength optical add drop multiplexers （OADMs） based on some technique papers. We introduce the principles and structures of them. They are （1） OADM using FBGs and multiport optical circulators; （2） OADM using waveguide grating routers and FBG; （3） OADM using AWG; （4） OADM using DMUX/MUX and optical switchs.  
        关键词：optical add drop multiplexer;fiber Bragg grating;optical circulator   
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      • CHEN Xin qiao,CHEN Ji dong,LUO Fang liang,SHEN Bin
        Issue 5, Pages: 16-18(2001) DOI: 10.13756/j.gtxyj.2001.05.005
        摘要：We put forward a new method to realize optical label switches using the phase shifted effective in Bragg phase shifted grating and device a experiment to achieve optical label switching. The grating is written in a standard fiber for communication and optical label switching is based on the cross phase modulation induced by an intense pump pulse on a low intensity probe  
        关键词：fiber gratings;nonlinear optics;optical label switches   
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      • Issue 5, Pages: 18(2001) DOI: 10.13756/j.gtxyj.2001.05.006
          
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      • LI Jing cong,WANG Yong,YIN Hong xi,WU De ming,XU An shi
        Issue 5, Pages: 19-21(2001) DOI: 10.13756/j.gtxyj.2001.05.007
        摘要：A new and promising switching paradigm optical burst switching （OBS） is introduced. We describe the basic concept and principle of OBS then present the network and node architecture of OBS. By comparing it with wavelength routing and optical packet switching, we summarize the advantage of OBS. Finally, problems to be resolved in OBS is pointed out.  
        关键词：burst;optical switching;optical burst switching;wavelength routing;optical packet switching   
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      • JIA Dong fang,GE Chun feng,YU Zhen hong,YANG Tian xin,LI Shi chen
        Issue 5, Pages: 22-26(2001) DOI: 10.13756/j.gtxyj.2001.05.008
        摘要：In this paper, the recent progress in Tbit/s WDM optical transmission are introduced, their advantages and shortcomings are discussed. And the key technologies to realize Tbit/s WDM optical communication are also analyzed.  
        关键词：Tbit/s;WDM;DWDM   
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      • LU Lin 1,ZHANG Bao fu 2,WANG Rong 2
        Issue 5, Pages: 27-31(2001) DOI: 10.13756/j.gtxyj.2001.05.009
        摘要：The scheme of IP over WDM metropolitan networks is proposed first. The wavelength routing multi hop metropolitan network topology and wavelength configuration are proposed and analyzed here.Several advises about metropolitan network are also proposed in this paper.  
        关键词：IP over WDM;ORMA NET;wavelength router   
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      • Issue 5, Pages: 31(2001) DOI: 10.13756/j.gtxyj.2001.05.010
          
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      • Issue 5, Pages: 32-35(2001) DOI: 10.13756/j.gtxyj.2001.05.011
        摘要：Based on OCDM encoding/decoding technology, this paper demonstrates the encoder or decoder of optical fiber delay lines in time domain and that using grating in spectral domain; a two layers network topology is proposed: a WDM ring network constructed on the basis of star network topology of OCDMA.  
        关键词：optical code division multiple access;optical fiber delay line encoder/decoder;encoder/decoder in the spectral domain;local area network   
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      • CHENG Xiao fei,XU Tao,LUO Lai rong,GU Wan yi
        Issue 5, Pages: 36-39(2001) DOI: 10.13756/j.gtxyj.2001.05.012
        摘要：CAD tools of WDM optical transport networks are introduced. Key problems are analyzed in design of CAD tool for WDM optical networks. Atomic functional models are presented and applied to build equipment models of WDM optical transport networks.  
        关键词：WDM;atomic functional model;CAD   
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      • YU Li,YANG Bo jun
        Issue 5, Pages: 40-43(2001) DOI: 10.13756/j.gtxyj.2001.05.013
        摘要：The history and recent progress in study on nonlinear optical communication are reviewed. The advantage and property of dispersion managed soliton transmission are presented. The employed prospects of optical soliton communication are described.  
        关键词：nonlinear optical communication;optical soliton;dispersion management   
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      • WANG Chao
        Issue 5, Pages: 44-47(2001) DOI: 10.13756/j.gtxyj.2001.05.014
        摘要：With the development of OTDM and DWDM technologies,the optical communication system is evolving towards the Tbit/s class. but the main limitation factors for optic telecommunication system have changed from attenuation to dispersion and non linear factors.The author analyzed the generation of dispersion, the sorts of dispersions and some solutions for overcoming the dispersion limitation.  
        关键词：dispersion compensation;prechirp;dispersion slope;auto dispersion compensation;PMD   
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      • LIU Ai shan
        Issue 5, Pages: 48-51(2001) DOI: 10.13756/j.gtxyj.2001.05.015
        摘要：The article contains a brief introduction to the designing flow of DSP （digital signal processing） as well as the way to implement it.The emphasis of the paper is laid on DSPs （digital signal processors） structural characteristic,operational rate,applications and market.The prospect of DSPs is touched in detail in this paper.  
        关键词：DSP;DSPs;designing flow   
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      • Issue 5, Pages: 51(2001) DOI: 10.13756/j.gtxyj.2001.05.016
          
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      • LI Chao yang,LIU Xiu min,LI Rong hua,YANG Bo jun,ZHANG Xiao guang,YU Li,REN Xiao min
        Issue 5, Pages: 52-55(2001) DOI: 10.13756/j.gtxyj.2001.05.017
        摘要：Polarization mode dispersion is measured by using Sagnac interferometer and polarization multiplexed solitons and is compensated successfully by using polarization controllers and PMF for the first time in China . The principle and results of the experiment are analyzed.  
        关键词：polarization mode dispersion;Sagnac interferometer;polarization multiplexed solitons;polarization mode dispersion compensation   
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      • LIU Chong qi
        Issue 5, Pages: 56-58(2001) DOI: 10.13756/j.gtxyj.2001.05.018
        摘要：The single mode output condition of fiber grating Fabry Perot resonator based on directional coupler is shown in this paper.The output spectrum of the cavity is completely single mode in this condition.the single mode property is analyzied.  
        关键词：Fabry Perot resonator;fiber grating;tuning   
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      • Issue 5, Pages: 58(2001) DOI: 10.13756/j.gtxyj.2001.05.019
          
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      • WEI Huai,TONG Zhi,JIAN Shui sheng
        Issue 5, Pages: 59-62(2001) DOI: 10.13756/j.gtxyj.2001.05.020
        摘要：By studying and analysing the fiber Raman amplifiers, this paper explored and discussed their properties. We also analysed the prospect of fiber Raman amplifiers and their potential problems by studying the properties of fiber Raman amplifiers as well as the requirement of today’s optical fiber communications. The latest development of fiber Raman amplifiers are introduced too.  
        关键词：optical amplifiers;fiber Raman amplifiers;stimulated Raman scattering;distribute amplification   
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      • Issue 5, Pages: 62(2001)
          
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