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Transcript
Total Internal Reflection
in Graded Index Fiber
(a)
TIR
n decreases step by step from one layer
to next upper layer; very thin layers.
(b)
TIR
Continuous decrease in n gives a ray
path changing continuously.
(a) A ray in thinly stratifed medium becomes refracted as it passes from one
layer to the next upper layer with lower n and eventually its angle satisfies TIR.
(b) In a medium where n decreases continuously the path of the ray bends
continuously.
© 1999 S.O. Kasap, Optoelectronics (Prentice Hall)