最新刊期
      卷 ， 期 2 ， 2003
      • YANG Liu 1,MAO Qian 2,HE Yan 2
        Issue 2, Pages: 1-4(2003) DOI: 10.13756/j.gtxyj.2003.02.001
        摘要：In this paper, we discuss a means whereby the EPON can emulate a shared LAN. We define a ULSLE module in MAC control layer of OLT. Using ULSLE module, PON’s downstream SCB ability can be utilized as most as possible, and point-to-point communication ability can be still offered by a EPON. Furthermore, OLT with ULSLE function, can be always connected to any standard Ethernet-compatible devices.  
        关键词：access network;LAN;PON;Ethernet;EPON   
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      • CHEN Chun-han,CAO Ming-cui,LOU Zhi-xiang,LI Feng
        Issue 2, Pages: 5-7(2003) DOI: 10.13756/j.gtxyj.2003.02.002
        摘要：A switch technique-optical burst switch, more suitable for current technique condition, is introduced. Varioue collision resolving protocols in optical burst switch are described and compared.  
        关键词：optical burst switch（OBS）;TAG protocal;LAUC protocal   
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      • SUN Jun
        Issue 2, Pages: 8-11(2003) DOI: 10.13756/j.gtxyj.2003.02.003
        摘要：This paper gives the application of ADNM algorithm under 5 different protection strategies which are no protection, 1∶1 protection（protection wavelengths are identical and variable）, 1∶1 protection and adjustment（protection wavelengths are identical and variable）. Blocking rate data versus different arriving rate are obtained through computer simulation. The results show that, protection will greatly increase blocking rate, the effect of protection wavelengths variability is evident in the case of large number of multiplexing wavelengths, and the protection adjustment can reduce blocking rate by about 5%.  
        关键词：WDM;optical network;RWA;protection   
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      • PAN Yong,ZHANG Min,YE Pei-da
        Issue 2, Pages: 12-15(2003) DOI: 10.13756/j.gtxyj.2003.02.004
        摘要：With exponential growth of Internet traffic and the leading position of WDM in the transport network, IP over WDM optical network is proved to be an ideal solution to carry the IP traffic. Through introducing the various developing stages of IP over WDM optical network, the paper aims to analyze its evolution clue.  
        关键词：IP over WDM;MPλS;digital wrapper;optical packet switching;optical Internet.   
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      • HUANG Feng
        Issue 2, Pages: 16-19(2003) DOI: 10.13756/j.gtxyj.2003.02.005
        摘要：This paper analyzes three solutions for metro ring network-multiservice SDH, metro WDM and Ethernet. In order to overcome the shortcomings of these solutions, we present the solution of resilient packet ring （RPR）+coarse WDM （CWDM）, describe its mechanism,frame definition, protection,etc.  
        关键词：metro network;CWDM;RPR   
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      • MU Bin 1,TAO Zhi-yong 2
        Issue 2, Pages: 20-22(2003) DOI: 10.13756/j.gtxyj.2003.02.006
        摘要：The RPR network consists of a mandatory protection mechanism called steering, and an optional protection mechanism called wrapping. The protection protocol is completely defined for both mechanisms, and either by itself is sufficient to meet RPR requirements.  
        关键词：RPR;network protection;steering protection;wrapping protection   
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      • WENG Yi-hui 1,HE Jian-ming 2
        Issue 2, Pages: 23-26(2003) DOI: 10.13756/j.gtxyj.2003.02.007
        摘要：First, this paper introduces the architecture of CAINONET and its network management layer construction in brief. Then the optical supervision channel technology and network management protocol of CAINONET are especially described.  
        关键词：CAINONET;network management;TMN;OSC;SNMP;CMIP   
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      • YUE Xin-quan 1,HUANG Jian-fei 2,WU Jian-xue 2
        Issue 2, Pages: 27-30(2003) DOI: 10.13756/j.gtxyj.2003.02.008
        摘要：Network structure and the relationship between service supplier and users have changed much with the rapid development of data services. It is an important research topic about how to make full use of the advantage of transmission network and data network to construct an operational and manageable service optical network. Intelligent optical transport network can satisfy above requirements well by adopting data wrapping technology ,control plane technology and series service interfaces.  
        关键词：OTN;ASON;interface   
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      • ZOU Chen
        Issue 2, Pages: 31-33(2003) DOI: 10.13756/j.gtxyj.2003.02.009
        摘要：This paper is mainly on the research and analysis of the actualities and development of DSLAM. At first, the system of DSLAM is divided into 3 parts, namely the circuitry, switch core and uplink interface. Then, their working principles and correlations are expatiated, paying much attention to the analysis of the differences and the application among different types of DSLAM. At last, the prospect of DSL is foreseen.  
        关键词：broadband access network;DSLAM;DSL   
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      • CAO Jun-zhong 1,2
        Issue 2, Pages: 34-37(2003) DOI: 10.13756/j.gtxyj.2003.02.010
        摘要：This paper presents optical power real-time supervisory system for optical cable in terms of its composition , basic elements and function. Communication method and protocol for alarm message and command transmission are analysed in detail. Finally,the system’s features and application field are discussed.  
        关键词：optical power supervision;optical cable;communication protocol   
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      • HUANG Li-qun,WANG Zhi,TONG Zhi,NING Ti-gang
        Issue 2, Pages: 38-40(2003) DOI: 10.13756/j.gtxyj.2003.02.011
        摘要：In this paper, the fundamental principle of nonlinear optical loop mirror （NOLM） is expatiated, the characteristic of NOLM is studied. Firstly, we find that NOLM has a function of compressing optical pulse width, self-phase modulation （SPM） in NOLMs is a crucial reason. Because optical Kerr effect is instantaneous （2～4 fs）, this function of NOLM is potentially applicable for high-speed optical fiber transmission system.  
        关键词：nonlinear optical loop mirror（NOLM）;self-phase modulation;optical pulse compression   
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      • GUO Ai-huang 1,2
        Issue 2, Pages: 41-45(2003) DOI: 10.13756/j.gtxyj.2003.02.012
        摘要：The optimization design and calculation of the arrayed waveguide grating（AWG） multi/demultiplexer are complex problems for the design of the integrating optical waveguide. In this paper, the numerical value calculation method for optimization design of the parameters of the AWG input/output waveguide, slab waveguide and arrayed waveguide is presented, this method can solve the complex problems of the AWG design and calculation, it can also provide a way for AWG computer aided design.  
        关键词：arrayed waveguide grating （AWG）;optimization design;parameter;calculation   
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      • PENG Shi-yu 1,YUAN Xiu-hua 2,ZHANG Guo-yun 1
        Issue 2, Pages: 46-48(2003) DOI: 10.13756/j.gtxyj.2003.02.013
        摘要：In this paper, we analysize the temperature and strain’s sensitivity of Bragg and long-period fiber gratings carefully, and obtain some important deductions which have some guiding purpose to the applications of optical fiber gratings in sensor fields.  
        关键词：FBG;LPFG;fiber grating sensor;temperature sensitivity;strain sensitivity   
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      • GAO Bin 1,2,ZHANG Jin-song 3,CHEN Tao 3
        Issue 2, Pages: 49-52(2003) DOI: 10.13756/j.gtxyj.2003.02.014
        摘要：A very promising optical amplifier, fiber optical parametric amplifier （OPA）, is introduced and dissertated in this paper. New research progress shows it has many attractive performances superior to that of conventional Er 3+ -doped fiber amplifier （EDFA）, semiconductor optical amplifier （SOA） and even fiber Raman amplifier （FRA）, such as full transparency to signal bit rate and modulation format, phase conjugation, very broad gain bandwidth, very low noise figure （NF） and excellent all-optical wavelength conversion function.  
        关键词：optical parametric amplifier （OPA）;four-wave mixing （FWM）;erbium-doped optical fiber amplifier（EDFA）   
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      • WEI Ren-xuan,JIANG De-sheng,ZHOU Zu-de
        Issue 2, Pages: 53-57(2003) DOI: 10.13756/j.gtxyj.2003.02.015
        摘要：Optical switch is the key component in optical communications, it is the research focus in recent years. Properties of optical switches based on MEMS are introduced. Emphasized on research and fabrication of MEMS optical switch abroad,the state of the art of optical switch is reviewed in terms of implementation, driving mode, etc. Some suggestions on development optical switch in China are proposed at the end of this paper.  
        关键词：MEMS;optical switch;optical communication   
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      • ZHANG Xu-lin 1,MA Hui-lian 1,HE Shi-Jin 2,DING Chun 1,WANG Yue-lin 1,JIN Zhong-he 1
        Issue 2, Pages: 58-62(2003) DOI: 10.13756/j.gtxyj.2003.02.016
        摘要：resonator fiber optic gyro （R-FOG） is a promising candidate for the next generation inertial rotation sensor. After much investigation and deep research, this paper analyzes the developments of the R-FOG, the basic theory, the noise factors and the countermeasures. At last, we prospect the trends of the R-FOG in the near future.  
        关键词：resonator fiber optic gyro;Sagnac effect;eigenstate of polarization;Raleigh backscattering;Kerr effect   
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