刘尔超刘尔超 通信通信 073 班班TOPIC:TOPIC:A discussion about Time-division MultiplexingABSTRACT:ABSTRACT:Will multi-channel light signals with time multiplex way that theyre in the same root in the fiber transmission, realize ultra-high speed transmission, achieve greatly expand capacity of purpose 1.1.the requirement of achieving Channel Multiplexing2 2.The principle of Channel Demultiplexing3.3.System Performance吴建兴吴建兴 通信通信 073 班班TopicTopic： Improve optical receiver sensitivity by Using a EDFA as the preamplifier circuitsOutlinesOutlines：1To calculate the receiver sensitivity ,we need to include all sources of current noise at the receiver.2Optical amplifiers are routinely used for improving the sensitivity of optical receivers by preamplifying the optical signal.3. Research the receiver sensitivity and signal gain relationship.申定辉申定辉 通信通信 073073 班班WDM Light-wave SystemABSTRACT:1. The origin ,development and principle of WDM2. The components and characteristics of WDM3. Key technologies and problems existing in the design of WDM4. The application of WDM刘宇滕刘宇滕 通信通信 073 班班Code division multiplexing introduction AbstractAbstract：To code division multiplexing of related principles of introduction：Code division multiplexing is using a group of contains code words are perpendicular to the code group carry multiple signals. By adopting the same wavelength of spread spectrum sequence, spectrum resources utilization, combining with WDM high, can be greatly increased system capacity. Spectrum and signal itself by the detuning is irrelevant to a coded to finish. Say spectrum characteristic of the detuning yards codes or keys, sometimes called address. Text：郑吉龙郑吉龙 通信通信 073073 班班TheThe introdocutionintrodocution ofof WDMWDM LightwaveLightwave SysteSystemsms1. the basic principle of WDM Lightwave Systems.2.the main application许瑞雪许瑞雪 通信通信 073073 班班Optical fiber Raman amplifiers principle of work and performanceOptical fiber Raman amplifiers working principle fiber Raman amplifiers working principle is based on quartz fiber the stimulated Raman scattering effects, in the form of performance for in pump modulation Raman gain bandwidth within the weak signal with strong pump for the transmission of PuGuangBo simultaneously in the fiber, thus make the weak signal light namely get amplification.Optical fiber Raman amplifiers performance analysis fiber Raman amplifiers performance decided it in future high-speed, high-capacity optical fiber communication system will play key roles.In the process of in-depth study FRA, pump sources are used to the selection and configuration, noise control etc is to be desired. Among them, the dispersion characteristics of optical fiber transmission of will cause disturbance, namely before and after yards intersymbol interference, limiting the transmission code rate and the transmission distance. Aiming at the transmission lines laid the existing G652 single-mode optical fiber dispersion the bigger question, can will DCF model G652 optical fiber as dispersion compensation and dispersion slope compensation parts, components compensation type FRA. 职荣保职荣保 通信通信 072072 班班CoherentCoherent lightlight communicationcommunication1. Definition of coherent light communication2.Coherent optical communication process of development3.Coherent optical communication principle of work4.Major advantages and Key technology5.Wide application and Research status刘坤刘坤 通信通信073班班DesignDesign andand analysisanalysis ofof a a novelnovel opticaloptical tunable-filtertunable-filter1 1IntroductionIntroduction2 2FilterFilter principlesprinciples3 3OpticalOptical filterfilter designdesign4.4. Conclusion.Conclusion.马瑞杰马瑞杰 通信通信 073073 班班Theory and Application of RFA at Long-DistantOptical Fiber CATV Network Signal Transmission(拉曼放大器的基本原理及其在有线电视光纤网长距离传输中的应用)Abstract：In the CATV system with AM VSB external modulation optical fiber transmission，High output level EDFA is usually adopted But the high level optical signal input will cause severe nonlinear distortion because of the dispersion effect According to Raman dispersion theory，this thesis concludes that the DFRAbrings obvious improvement to the CSO index in longdistant signal transmissionIt also compares the effectsbetween DFRA and EDFA and gets the same resultKey words：EDFA ；DFRA ；CSOMain body：1. Summary2. theory and structure of RFA3. Application of RFA at Long-distant optical fiber CATV network signal transmission4. Attention to the problemsReferences：【1】【2】李朋李朋 通信通信 074074 班班Computer Aided Design of optical fiber communication system1, the introduction of CAD in fiber optic communication system design of the status quo.2, computer-aided design process.3, give a simple example of computer-aided design郭润辰郭润辰 通信通信 073073 班班ApplicationsApplications ofof OpticalOptical AmplifiersAmplifiersSummary: Fiber amplifier have become an integral part of almost all fiber-optic communication systems installed aft