Question

A manufacturer wishes to make a silica-core,step-index fiber with V = 75 and a numerical aperture of 0.3 to be used at 820nm. Suggest your own value of core refractive index and help the manufacturer to find core size, cladding index and number of modes. Justify your suggestion.​

Answer 1

The given silica-core, step-index fiber with normalized frequency V = 75, the Numerical Aperture (NA) is 0.30 at 820nm and core index value of

Refer to equation 2.59 from the text book,

 , rewrite that equation is



Thus, the core size denoted by, =1.427

(I think this is the answer)

Answer 2

HOPE IT HELPS YOU.!!!!!.