Graded-index fiber

Pulse dispersion in a graded index optical fiber is given by

$${\displaystyle \mathrm {Pulse~dispersion} ={\frac {k\delta n\ n_{1}\ l}{c}}\,\!,}$$

where

${\textstyle \delta n\,\!}$ is the difference in refractive indices of core and cladding,

${\textstyle n_{1}\,\!}$ is the refractive index of the cladding,

${\textstyle l\,\!}$ is the length of the fiber taken for observing the pulse dispersion,

${\textstyle c\approx 3\times 10^{8}~\mathrm {m/s} \,\!}$ is the speed of light, and

${\textstyle k\,\!}$ is the constant of graded index profile.

• Power-law index profile
• Gradient index optics

•  This article incorporates public domain material from Federal Standard 1037C. General Services Administration. (in support of MIL-STD-188).