Kashima N, Uchida N
Appl Opt. 1977 Apr 1;16(4):1038-40. doi: 10.1364/AO.16.001038.
Theoretical and experimental investigations are made on an excess loss arising due to a lossy outer layer attached around a cladding in multimode step-index fibers. Equations for evaluating the excess loss are derived using the electromagnetic theory for LP modes. Experiments are made on fibers with a pure fused silica jacket around a cladding, focusing on the wavelength dependence of the excess loss. It is found that the loss increases as the wavelength becomes long and that the measured values are in good agreement with the calculated ones.
对多模阶跃折射率光纤包层周围附着有损耗外层所产生的附加损耗进行了理论和实验研究。利用LP模式的电磁理论推导了评估附加损耗的方程。对包层周围有纯熔石英护套的光纤进行了实验，重点研究了附加损耗的波长依赖性。发现损耗随着波长变长而增加，并且测量值与计算值吻合良好。
