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A multimode step-index fiber has a core refractive index of 1.5 and relative refractive index difference of 1%. The length of the optical link is 6 km. Estimate the RMS pulse broadening due to intermodal dispersion on the link.

A multimode step-index fiber has a core refractive index of 1.5 and relative refractive index difference of 1%. The length of the optical link is 6 km. Estimate the RMS pulse broadening due to intermodal dispersion on the link. Correct Answer 86.7 ns

The RMS pulse broadening due to intermodal dispersion is obtained by the equation is given below: σs = Ln1Δ/2√3c Where σs = RMS pulse broadening L = length of optical link C = velocity of light in vacuum n1 = core refractive index.

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