Saturday, 4 June 2016

Graded index fibers

In case of graded index fibers, the refractive index of core is made to vary as a function of
radial distance from the centre of the optical fiber.

Refractive index increases from one end of core diameter to center and attains maximum
value at the centre. Again refractive index decreases as moving away from center to
towards the other end of the core diameter.

The refractive index variation is represented as …….

 The number of modes is given by the expression

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