Schicketanz D W, Eoll C K
Appl Opt. 1990 Sep 20;29(27):3916-20. doi: 10.1364/AO.29.003916.
The material dispersion of a parabolic graded-index fiber can be completely characterized through numerical aperture measurements. The relation between the dispersion slope and wavelength of zero dispersion is discussed for single-mode fibers, and the corresponding relation for material dispersion in multimode fibers is presented. Then the effective wavelength of zero material dispersion in a multimode fiber is expressed in terms of a quantity that resembles a numerical aperture. Formulas relating that quantity to measured numerical apertures are derived in the Appendix. Starting with just numerical aperture measurements, therefore, one may determine the effective wavelength of zero material dispersion and effective material dispersion slope for a multimode fiber.
抛物线型渐变折射率光纤的材料色散可以通过数值孔径测量来完全表征。讨论了单模光纤的色散斜率与零色散波长之间的关系，并给出了多模光纤中材料色散的相应关系。然后，用一个类似于数值孔径的量来表示多模光纤中零材料色散的有效波长。附录中推导了该量与测量数值孔径相关的公式。因此，仅从数值孔径测量开始，就可以确定多模光纤的零材料色散有效波长和有效材料色散斜率。
