Question

Calculate the numerical aperture and acceptance angle of a fiber with a core index of 1.54 and a cladding index of 1.50 when the fiber is inside water of refractive index 1.33. (Approximately)

Answer 1

Answer:

Sol: Let the refractive index of core, n1 = 1.48

and the refractive index of cladding , n2 = 1.45

   Numerical aperture (NA) images

                   images

   Let θ0 be the acceptance angle

   n2 sin 90 = n1 sin θc [θc = critical angle]

   The fractional refractive ...

Explanation: