Equation (9.45) was derived for the case where the light incident upon the sending end of the optical fiber extends over the entire acceptance cone shown in Fig. 9-12(b). Suppose the incident light is constrained to a narrower range extending between normal incidence and θ′, where θ′ < θa.
(a) Obtain an expression for the maximum data rate fp in terms of θ′.
(b) Evaluate fp for the fiber of Example 5 when θ′ = 3°.
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