5. Dispersion The refractive index of fused silica in the wavelength region 0.5 um

5. Dispersion The refractive index of fused silica in the wavelength region 0.5 gm < Xo < 1.6 gm is approximately given by the following empirical formula where 1.451; a=O.003, 0.003 and is measured in micrometers. a. b. c. Find the expression for the group index and calculate the phase velocity and group velocity at 0.6 gm and 1.1 gm. Calculate the zero material dispersion wavelength. The wavelength where dn/dld = O. Calculate the dispersion, D (ps/km-nm) at 0.6 gm and 1.1 gm.