(Solved): A glass fiber exhibits material dispersion given by 2(d2d2n1) of 0.025 . i. Calculate mat ...

A glass fiber exhibits material dispersion given by ${?}^2\left(\frac{d^2{n}_1}{d{?}^2}\right)$ of 0.025 . i. Calculate material dispersion parameter at a wavelength of $0.85?\mathrm{m}$, and estimate the rms pulse broadening per kilometer for a good LED source with the $rms$ spectral width of $20\mathrm{nm}$ at this wavelength. (4 Marks) ii. If the optical source used is an injection laser with a relative spectral width ${?}_{?}/?$ of 0.0012 at wavelength of $0.85?\mathrm{m}$ is used, show the estimated rms pulse broadening per $\mathrm{km}$ for the fiber. (3 Marks)