Literature Survey on Impact of Chromatic Dispersion on Bit Error Rate in Single Mode Fibre and Improvement Techniques

In the fibre optic communication, the signal degradation in transmission signal occurs with the increase in distance. The signal compensate signal degradation are improved by electronic regenerators based on optical technology. Now with the advent of optical amplifier the problem can be reduced [1]. In optoelectronic regenerators, firstly the optical signal is converted into electric signal and then again converted into electrical signal from the optical signal at the receiver. But the configuration of regenerators is very complex and generally very expensive for wavelength division multiplexing systems when designed for long distance optical communication. Because of this the reliability of WDM networks is reduced with the use of regenerator as an active device. Hence it is required to upgrade multichannel WDM system optical amplifiers are require to compensate the chromatic dispersion. In this paper we analyse the impact of chromatic dispersion in WDM system and different chromatic dispersion schemes. This paper also deals with the techniques to improve bit error rate and quality factor. For this purpose, different techniques are analysed and compare. The optical amplifier is majorly use for WDM (Wavelength division multiplexing) light wave systems because all channels can amplify simultaneously with less error probability.