Numerical analysis of eigenmodes and splice losses of thermally diffused expanded core fibers
Numerical analysis of eigenmodes and splice losses of thermally diffused expanded core fibers
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DOI：
10.1109/50.809689
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发表时间：
1999-12
影响因子：
4.7
通讯作者：
Y. Ohtera;O. Hanaizumi;S. Kawakami
中科院分区：
文献类型：
--
作者：
Y. Ohtera;O. Hanaizumi;S. Kawakami
通过数值分析，阐明了热扩散膨胀芯（TEC）光纤本征模的场分布和远场模式。利用比近场图（NFP）更容易测量的FFP来估计TEC光纤的光斑尺寸。考虑间隙、偏移和倾斜的单一或复合效应，对两种TEC纤维的剪接损耗进行了数值分析。该结果可用于估计光纤集成光隔离器的隔离度和其他光纤集成型光器件的插入损耗。考虑有间隙的TEC光纤两端多次反射的剪接损耗也进行了数值分析。这对光纤集成可调谐波长滤波器的设计是有用的。
Field distributions and far-field patterns (FFP's) of the eigenmodes of thermally diffused expanded core (TEC) fibers are clarified by numerical analysis. The spot size of the TEC fiber is estimated by using the FFP that can be measured more easily than the near-field pattern (NFP). Splice losses of two TEC fibers are analyzed numerically considering a single or composite effect of gap, offset, and tilt. The results are useful for estimating isolations of fiber-integrated optical isolators and insertion losses of other fiber-integrated type optical devices. Splice losses considering multiple reflection between two endfaces of the TEC fibers with gaps are also analyzed numerically. This is useful for the design of fiber-integrated tunable wavelength filters.