最新刊期
      卷 ， 期 4 ， 2002
      • XI Shen e,YANG Zhu
        Issue 4, Pages: 1-5(2002) DOI: 10.13756/j.gtxyj.2002.04.001
        摘要：This paper introduces the principles and characteristics of Raman fiber amplifier, and especially discussed the experimental results of 32×10 Gbit/s high speed transmission system adopting RFA. We also analyze the improvement of RFA in terms of system performances and its potential applications in the future.  
        关键词：Raman fiber amplifier（RFA）;Raman gain;SNR;NF   
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      • SUN Jun,DI Xiao kan
        Issue 4, Pages: 6-9(2002) DOI: 10.13756/j.gtxyj.2002.04.002
        摘要：There’re many types of SDH equipments and each equipment has its own cross connection limitation. A routing and timeslot selection algorithm is proposed in this paper which can establish an end to end connection in SDH networks satisfying the constraint and optimizing the usage of network resources.  
        关键词：SDH;network;cross connection;routing algorithm;optimization;end to end connection   
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      • LIU Hui,LI Guang cheng
        Issue 4, Pages: 10-12(2002) DOI: 10.13756/j.gtxyj.2002.04.003
        摘要：The bandwidth allocation on demands will become reality when the technology of statistics & time multiplexing is applied to SDH equipment.This paper introduces a statistics & time multiplexing technology called MP over SDH for conventional SDH equipment which is more suitable for carring MAN services.  
          
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      • LIU Ai shan,YANG Ming
        Issue 4, Pages: 13-15(2002) DOI: 10.13756/j.gtxyj.2002.04.004
        摘要：This paper introduced the technique of Super FEC with its current products, as well pointed out its defects: no transparency and no standard, and proposed the way for Super FEC to go to standardization.  
        关键词：FEC;Super FEC;concatenation technique   
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      • ZHENG Fu sheng,ZHANG Jin song
        Issue 4, Pages: 16-21(2002) DOI: 10.13756/j.gtxyj.2002.04.005
        摘要：The introduction of OPS has improved the use rate of bandwidth and flexibility of network, extended the optical transparency. On optical packet switching layer, the generation,synchronization, buffering and regeneration of optical packet become key technologies. The multi wavelegth is not the only mode of OPS, the OTDPS,OLS,WD & mixing packet switching, MPλS and OBPS will exert great influences on future communication networks.  
        关键词：optical packet;switching mode;OBPS;OLS;MPλS   
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      • HOU Ke gang
        Issue 4, Pages: 22-25(2002) DOI: 10.13756/j.gtxyj.2002.04.006
        摘要：This paper analyzed the metro WDM technique in terms of market demand, technical and economical characteristics and current status of system and transmission fiber.  
        关键词：MAN;WDM;fiber   
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      • GUI Liang qi 1,LU Jun 2,GUO Wei 1
        Issue 4, Pages: 26-30(2002) DOI: 10.13756/j.gtxyj.2002.04.007
        摘要：TETRA is a new digital trunking standard established by ETSI.It is one of the best mobile communication systems.This paper analyses the air interface layer 2 protocols of TETRA and its sublayers’ communication, then introduces the software implementation method.  
        关键词：TETRA;SDL;air interface;protocol   
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      • GAO Yuan 1,LU Jun 2,ZHANG Zu yin 1
        Issue 4, Pages: 31-36(2002) DOI: 10.13756/j.gtxyj.2002.04.008
        摘要：In order to improve the channel error control capacity under the precondiction of good sprectrum efficiency, TETRA standard adopts relatively complex coding techniques. This paper introduced the channel coding schemes used in TETRA, analyzed the performance of principle channel coding techniques and then gave the channel coder implementation scheme.  
        关键词：digital trunking system;TETRA;channel coding   
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      • LI Yan jie,FENG Qing yong,SUN Tao,SU Yu zhen
        Issue 4, Pages: 37-39(2002) DOI: 10.13756/j.gtxyj.2002.04.009
        摘要：This paper describes features and effects of YH 4 hot melt adhesive for telecommunication cable and presents causes that influence its high temperature resistance performance. Newly developed hot melt adhesive is further analyzed and discussed in this paper.  
        关键词：hot melt adhesive;softening point;peeling strength.   
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      • CHENG Shu ling 1,LIU Yi xia 1,HUANG Lan 1,WANG Yu liang 1,WANG Dan 1,CHEN Yong shi 1,AKIRA Sano 2
        Issue 4, Pages: 40-43(2002) DOI: 10.13756/j.gtxyj.2002.04.010
        摘要：In this paper, we have introduced the principle of measuring the fiber strain with a BOTDR, and have introduced a test method with BOTDR to analyze the fiber strain distribution of each process in manufacturing stranded loose tube cable. It was proved by two examples that the method introduced below is very effective for the analyzing of manufacturing control process.  
        关键词：BOTDR;Brillouin scattering;Brillouin frequency shift;strain distribution   
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      • HE Fang rong 1,WEI Zhong cheng 2
        Issue 4, Pages: 44-48(2002) DOI: 10.13756/j.gtxyj.2002.04.011
        摘要：In this paper, the current status in manufacturing technologies of optical fiber preform were described, the development trends for all kinds of optical fiber process were analyzed in details. Also, the presentation of the up to date technologies for optical fiber preform manufacturing was given in this paper.  
        关键词：optical fiber;preform;manufacturing technology   
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      • ZOU Xing chuan,HU Yi,ZHENG Lin,WANG Biao,LI He bin
        Issue 4, Pages: 49-54(2002) DOI: 10.13756/j.gtxyj.2002.04.012
        摘要：The necessity and importance of developing 10 Gbit/s O/E transponder module has been analyzed. The theory, features and performance parameters of 10 Gbit/s transponder have been introduced and explained. The experiment shows that our 40 km 300 pin MSA 10 Gbit/s transponder modules can implement free bit error transmission over 43 km G.652 SMF. Some parameters of the modules in Transmission have also been tested.  
        关键词：MSA（Multi Source Agreement）;10 Gbit/s;transponder module;O/E converter;multipleser/demultipleser   
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      • SHEN Bai lin,ZHANG Xin liang,SUN Jun qiang
        Issue 4, Pages: 55-58(2002) DOI: 10.13756/j.gtxyj.2002.04.013
        摘要：The all optical wavelength converter will be one of the key devices in the future DWDM networks. In this paper, we describe the realization methods, principle and progress of some kinds of all optical wavelength converters, and the optimal placement of wavelength converters in the future DWDM networks.  
        关键词：all optical wavelength conversion;DWDM;SOA;nonlinear optical loop mirror   
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      • HOU Rui,HE Dui yan,CHEN Dan
        Issue 4, Pages: 59-62(2002) DOI: 10.13756/j.gtxyj.2002.04.014
        摘要：This paper present a method to analysis arbitrarily shaped rib waveguide.Firstly, using effective-index method can get the effective index of the rib waveguide, secondly, using transfer matrix theory can get the mode dispersion equation.  
        关键词：rib waveguide;mode dispersion equation;equivalent refractive index;transfer matrix   
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