Ikeda M, Yoshikiyo H
Appl Opt. 1976 May 1;15(5):1307-12. doi: 10.1364/AO.15.001307.
The transmission characteristics of multimode graded index optical fibers, whose refractive index profiles were nearly parabolas, were measured. No change of the output pulse waveform could be detected at a 1-km length with a lowest-order mode excitation. In the case of mismatching excitation, output pulse waveforms separated into two pulse peaks. This was caused by the refractive index profile that was not a single function but a combination of two functions.
对折射率分布近似为抛物线的多模渐变折射率光纤的传输特性进行了测量。在最低阶模激励下，1公里长度处未检测到输出脉冲波形的变化。在激励不匹配的情况下，输出脉冲波形分离为两个脉冲峰值。这是由折射率分布不是单一函数而是两个函数的组合引起的。
