摘要
采用矢量场分析法,推导出左手材料包层抛物型渐变光纤TE模的传输功率和功率限制因子,绘制出几种TE模式下功率限制因子随归一化频率变化的曲线。分析得出结论:在频率较低时,TE模式的功率限制因子随归一化频率的变化出现了一定的波动,波动最低点的功率限制因子值随纤芯-包层磁导率比|η|的增大而减小,而随TE模式序号的增大而增大;对于一定的模式,|η|较小时,功率限制因子在频率较低时有明显的波动,说明在低频时选用|η|较小的光纤有利于减少光纤对接时的耦合损耗等。
Based on vector field analysis method , this paper concludes transmitted power and power confinement factors of left-handed material clad and parabolic graded Index Fiber , depicts several changing curves of power confinement factors with the change of normalized frequency under TE modes background Conclusions Can be obtained as fouows:Power confinement factor curve of TE modes appear depressions at different levels at low-frequency stage ,power confinement factor value of the lowest sinking point going downward with core packet permeability ratio |η|going upward and going upward with the modes order number going upward;For fiber-optic with low |η|, power confinement factors display significant fluctuations in low frequency areas .Under low transmission signal frequency circumstances , fiber-optic with low|η|is beneficial for coupling loss reduction at the point of fiber-optic butt .
出处
《齐鲁工业大学学报》
CAS
2013年第3期89-91,共3页
Journal of Qilu University of Technology
基金
山东省高等学校科技计划项目(J13LB01)
关键词
光纤光学
负折射率介质
抛物型渐变光纤
功率限制因子
归一化频率
fiber optics
negative refractive index media
parabolic graded index fiber
power confinement factor
normalized frequency
