An Improved Methodology for Dispersion Compensation and Design of Dense WDM System in Optical Fiber Communication Networks

In telecommunication, a method for managing dispersion that combines two or more types of single mode fiber to produce the desired dispersion over the entire link span has been proposed. The total dispersion can be set at virtually any value as the contributions from different components may have opposite signs (i.e. either positive or negative) and hence they can partially, or completely, cancel each other. Dispersion-compensating fibers can be either placed at one location or distributed along the length of the fiber link. Typically, dispersion management must consider single-mode fiber chromatic and Polarisation mode dispersion (PMD) dispersion over a range of wavelengths. We design the dense WDM system signals at central wavelengths in the region of 1550 nm. This method offers almost negligible dispersion by reducing the jitter portion in Eye diagram. This method also offers high value of Q-factor and reduced BER in long haul optical communication networks. Keywords--Chromatic dispersion, PMD, DCF, Q-factor, BER, Threshold value, Dense WDM.