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A silica multimode step-index fiber has core and cladding refractive indices of
1.48 and 1.46, respectively. The equilibrium length of the fiber is 2 km. The light
source emits at 820 nm and has a spectral width of 120nm. Compute the electrical
3-dB bandwidth of a 5-km length of this fiber and the maximum RZ and NRZ
data rates.
Repeat the problem for a Graded-index fiber when the spectral width of the light
source is reduced to 20 nm.
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