Presby H M, Kaminow I P
Appl Opt. 1976 Dec 1;15(12):3029-36. doi: 10.1364/AO.15.003029.
The variation of the core-cladding refractive index difference Deltan(lambda) is determined as a function of wavelength for GeO(2)-SiO(2), B(2)O(3)-SiO(2), TiO(2)-SiO(2), P(2)O(5)-SiO(2), Al(2)O(3)-SiO(2), and Cs(2)O-SiO(2) optical fibers. The measurements are obtained by electronically processing the output of an interference microscope illuminated by a monochromatic light source variable over the 0.5-1.1-microm range. The Deltan(lambda) results are utilized to calculate the precise grading of the refractive index profile characterized by an exponent alpha(lambda) required to achieve a minimum modal dispersion. The material dispersion for these compositions is also calculated with the aid of available n(lambda) data for SiO(2).
对于GeO₂ - SiO₂、B₂O₃ - SiO₂、TiO₂ - SiO₂、P₂O₅ - SiO₂、Al₂O₃ - SiO₂和Cs₂O - SiO₂光纤，测定了纤芯 - 包层折射率差Δn(λ)随波长的变化。测量是通过对由在0.5 - 1.1微米范围内可变的单色光源照明的干涉显微镜的输出进行电子处理而获得的。利用Δn(λ)结果来计算折射率分布的精确渐变，该渐变由实现最小模式色散所需的指数α(λ)表征。这些成分的材料色散也借助于SiO₂的现有n(λ)数据来计算。
