简介:BasedontheopticalfibermodetheoryandemployingtheexpertizedsoftwareCOMSOL,westudytheeffectofellip-ticityandmisalignmentontheeffectiverefractiveindices,walk-offandintensitydistributionoftheevenandoddei-genmodesthatformthebasisoftheorbitalangularinomentum(OAM)modesinaringfiber.Ourresultsshowthattheeffectiverefractiveindexdifferenceandthewalk-offincreasewiththeellipticityandmisalignment,thusreducingthestabilityoftheOAMmodes.WefindthatthemisalignmenthasagreaterimpactontheOAMmodesthantheelliptic-ity,andboththemisalignmentandellipticityaffectthelower-orderOAMmodesmoresignificantly,suggestingthatthehigher-orderOAMmodesaremorestableduringpropagation.
简介:本文介绍了光突发交换(OBS)网络中的一种操作维护管理(OAM)方案,包括这种OAM方案的结构、功能、分组过程和分组格式。此方案可以实现光通道连接顺畅,并可检查OBS网络状态和突发包的功能。