Optical fiber inside the communication system has become one amongst the most cabling attractive and usually used to protection and safely and in addition transmission longer distance is possible in addition contain a large kind of data rate and additionally the demand for digital communication is growing quickly due to the increasing quality of the web and different factors. So on satisfy the growing demands for bandwidth, however, there ar some limiting factors for optical fibers throughout the transmission of the signal to Distance long of these problems is dispersion. Throughout this study, the simulation of the optical system in optical fibre has been mentioned by analyzing the effect of the elements by using whole totally different parameters setting. The value of parameters has been investigated like Signal power (dBm), output power (dbm), Q-Factor.