Investigation and performance analysis of WDM system implementing FBG at different grating length and datarate for long haul optical communication

With the discovery of optical fiber there was a widespread revolution in the field of communication. Optical fiber communication offers high data rate, security, flexibility, higher bandwidth etc. However factors such as dispersion, attenuation, scattering etc., greatly hampers it's performance. Moreover it's dispersion that severely damages the high speed data transmission in optical fiber. Dispersion causes the pulse to spread as it travels along the fiber and causing interference. There are various methods for dispersion compensation. This research is done to emphasize the effect of dispersion and how to overcome it by using FBG. Fiber Bragg Grating is one of the widely used technology to compensate dispersion in optical fiber communication and here we have used FBG to compensate dispersion in a 80Gb/s WDM network using NRZ modulator at transmitter side and the results thus obtained are compared. The value of Q-factor, eye height and bit error rate (BER) is determined for each and every channel and their values are compared.