In a step-index optical fiber system, explain the terms pulse dispersion
and material dispersion.
An optical fiber having refractive indices of core and cladding n₁ = 1.463
and n2 = 1.444 respectively, uses a Laser diode with λο = 1.50 µm with a
spectral width of 2 nm. At this wavelength if the material dispersion
coefficient, Dm is 18-23 ps/km.nm, then calculate the pulse dispersion
and material dispersion for 1 km length of the fiber.
20
