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1、射线光学方法分析薄膜波导多模光纤的射线光学分析一一孔午线与偏射线伊Ameridionals言y【】鼬丨fiberaxis余Askewraydoesnotavetocrosstheb虔锹嶂擅磺dt情数值孔径MaximumacceptanceangleCnaxisthatwhichjustgivestotalinternalreflectionatthecore-claddinginterfaceiewhenQ=Qnaxthen0=0.Peyswithax(egrayB)bscormerelractedandpenetratethecladdingandareeventuallylost光纤的损耗
2、一一散射损耗Adiclectricparticlemallerthanwavelength吴XScatteredweves弯曲损耗一一循弯曲与宏弯曲波导色散与光纤芯径关系Dispersioncoefticlent(pskm-1nm-0)20SI02-13.5%Ge0色散对模拟信号光传输系统的影响EisxricalsgnapphelocurrentFbsSnuaidasgaEniterPhaedseeie。苓尹厂一园门一SnndasssgaDD广MRIRIITeuinaInexOopot口InputlghtpowOuibxtlgtpaeRAA.仨丛丛懦嚣(Multimodesiepindexfiber.Raypathsaredifferentsothatreysanivealtdifferenttimes(B)Gradedindexfiber.PathsaredifferentbutsoaretheveloditiesalongthepathssothatalltheraysanivesttheSametimes自聚焦透镜|ii0.25P0.23P量1餐(a)仪)(o)
