Performance Evaluation of Photodetection fiber of Noises in Optical to Communication Systems

Abstract

The detector is an essential component of an optical fiber communication system and is one of the crucial elements which dictate the overall system performance. Shot noise and thermal noise added by avalanche photodiode (APD) and Positive intrinsic negative photodiode (PIN) degrade the received signal on optical communication receivers systems. There for this affects in the overall performance of fiber optic communication system. This thesis will evaluate the performance of optical communication receivers systems by using optimal gain of APD to reduce affect of shot noise and thermal noise in detected signal, Performance of photo receivers in optical communication receivers evaluated and simulated by using optisystem software. From simulation results, found the PIN gives better performance than APD in existing of shot noise, also APD gives better performance than PIN in existing of thermal noise because it have internal gain that not achieved in PIN and observed the maximum gain for APD is 16 to maintain best performance.