Step indes fiber:
An optical fiber with a core of constant refractive index(n1) and a cladding of slightly lower refractive indes(n2) is known as the step index fiber.A term 'step' is given because the refractive index profile for this type of fiber makes a step change at the cor-cladding interface. All the fibers considered so far are therefore the step index fiber.
Graded indes fiber:
The optical whose refractive index is maximum n1 at the axis and gradually decreases with the radial distance from the axis to a xonstant refractive index n2 the caldding is known as the graded index fiber.The profile parameter alpha condtrols the profile i.e shape of the refractive indes of core of the fiber. Although an infinite number of profiles can be obatined with different values of alpha, only the step.
An optical fiber with a core of constant refractive index(n1) and a cladding of slightly lower refractive indes(n2) is known as the step index fiber.A term 'step' is given because the refractive index profile for this type of fiber makes a step change at the cor-cladding interface. All the fibers considered so far are therefore the step index fiber.
Graded indes fiber:
The optical whose refractive index is maximum n1 at the axis and gradually decreases with the radial distance from the axis to a xonstant refractive index n2 the caldding is known as the graded index fiber.The profile parameter alpha condtrols the profile i.e shape of the refractive indes of core of the fiber. Although an infinite number of profiles can be obatined with different values of alpha, only the step.
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