Performance analysis of optical double sideband and optical single sideband generation using mach zehnder modulator chirp and extinction ratio over different fiber link

In this paper, we present theoretical and simulative studies on optical double sideband (ODSB) and optical single sideband (OSSB) Radio over Fiber (RoF) system. The simulations were carried out using Mach Zehnder Modulator (MZM) by varying its chirp and Extinction Ratio (ER) over different fiber link. In RoF systems, with the increase in RF frequency, the chromatic dispersion becomes severe thus reducing the transmission distance over fiber link. In this paper, we show that the effect of chromatic dispersion can be reduced and transmission distance can be increased by employing an MZM with negative chirp. Further, we analyze that the system using OSSB is more immune to dispersion effects as compared to ODSB systems. In addition, we show that the received RF power variations become negligible and second order harmonics reduces with the signal transmitted over RoF system using MZM with negative chirp for different ER.