Chromatic and modal effect of graded-index optical fiber in LAN context

In this work, we have studied transfer function of multimode optical fibers considering chromatic and modal dispersion in the local area network (LAN) context. The chromatic transfer function is explored with taking into account two wavelength used in optical LAN. We have investigated mode-depending parameters, namely, modal delay, modal attenuation and mode-coupling effects as a function of wavelength. We have reported that the number of excited mode groups depend strongly on spot radius beam when the fiber is excited with a Gaussian input beam. We have proved that, frequency response of silica optical fiber is comprised between 3 and 6 dBo for 850 and 1300 nm when chromatic and modal effect is considered.