光导纤维剖面色散是设计梯度型光纤最佳折射率分布时必须考虑的性能。它反映了光纤芯折射率分布随波长的变化。贝尔实验室的R.Olshansky和D.B.Reck认为,为了获得光纤的最大传输带宽,其纤芯折射率分布指数的最佳值α_(opt)。应按(1)式选取。α_(opt),=α-2P-12△/S (1) 式中△为缆包层的相对折射率差。P为剖面色散参数,(profile dispersion parameter), Optical fiber profile chromatic dispersion is the performance that must be considered when designing the optimal refractive index profile of gradient optical fiber. It reflects the fiber core refractive index distribution with wavelength. According to R. Olshansky and D.B. Reck of Bell Labs, in order to obtain the maximum transmission bandwidth of an optical fiber, the optimum refractive index index α_ (opt) of the core is obtained. Should be (1) type selection. α_ (opt), = α-2P-12Δ / S (1) where Δ is the relative refractive index difference of the cable jacket. P is the profile dispersion parameter,