Differentiate between step index and graded index optical fiber Please concise and brief?

Answer 1

Step index fiber has a core of one index of refraction; graded index fiber has a core in which the outside edge starts with a low index of refraction that gradually increases towards the center.

Answer 2

the transit time delay cannot be avoided in step index fiber while it can be avoided in graded index fibre

Answer 3

in step index fibre the refractive index isconstant,whereit changes in graded index fibre