Question

A step index fiber is made with a core of refractive index 1.36, a diameter of 49pm and a fractional refractive index change of 0.025. it is operated at a wavelength of 1.3

Find the refractive index of cladding

Answer 1

Answer

the refractive index is inversely proportional to the wavelength.

refractive index of the material of the cladding we want to calculate.

Let the refractive index of cladding be n'So we have

$\Delta n=\frac{n-n'}{n}$

$0.025=\frac{1.36-n'}{1.36}$

$n'=1.326$