DISPERSION COMPENSATION TECHNIQUES USED IN OPTICAL FIBER COMMUNICATION

Optical fiber is one of the most important communications media in communication system. Due to its versatile advantages and negligible transmission loss it is used in high speed data transmission. In order to maintain high value of optical signal to noise ratio (OSNR) for having a signal of good quality it is important to compensate dispersion in optical finer communication system. With Dispersion optical fiber’s performance degrades. Research was carried on how dispersion can be compensated. Dispersion compensation in fiber optical communication system has become a topic of great importance and research these days because any presence of dispersion might lead to pulse spreading which might cause inter symbolic interference (ISI) which leads to signal degradation. In this manuscript, various types of dispersions are discussed in a brief way. Also different methods of dispersion compensation like-Dispersion compensation fiber (DCF), Electronic Equalizer, Fiber Bragg Grating (FBG) and digital filters are discussed in detail.