Question

(a) Using ray diagram, draw the light propagation in (i) Single mode step index fiber (11)
Multimode step index fiber (iii) Multimode graded index fiber. Also show the nature of input
and output ware patterns.
(1)) An optical fibre is of diameter 200 micro motor. If the core refractive index is 1.5, find
the axial distance travelled by a ray incident at 30 degree between two successive internal
reflections
(5+5)

Answer 1

a) Using ray diagram, draw the light propagation in (i) Single mode step index fiber (11)

Multimode step index fiber (iii) Multimode graded index fiber. Also show the nature of input

and output ware patterns.

(1)) An optical fibre is of diameter 200 micro motor. If the core refractive index is 1.5, find

the axial distance travelled by a ray incident at 30 degree between two successive internal

reflections

(5+5)