Analysis of Dispersion Compensation Methods in WDM Systems

Abstract

Objectives: WDM systems are high-performance systems. Light signals can be transmitted to longer distances by using WDM systems. The efficiency of light signals is reduced by optical effects such as dispersion and attenuation. Attenuation can be reduced by using powerful optical amplifiers. Dispersion causes errors in optical communication systems. So dispersion has to be minimized to obtain better performance of WDM systems. This paper analyzes the different types of dispersion compensation techniques that can be used in WDM Systems to minimize dispersion. Methods/Statistical analysis: In dispersion compensation technique, dispersion compensation fiber (DCF) is placed at different positions of optical fiber to reduce dispersion. The negative dispersion in DCF removes the dispersion in SMF. The three dispersion compensation techniques pre-compensation, post-compensation, and symmetric compensation techniques are analyzed with Optisystem. The structure of FBG also helps to compensate dispersion in optical systems. Dispersion compensation by FBG is also analyzed with Optisystem. Findings: Pre-compensation technique shows good performance for very shorter distances. Performance of pre-compensation is reduced for long distances. Post-compensation also do not show good quality factor for longer distances. Symmetric compensation shows the best performance and quality factor for longer distances and is the best method out of the three compensation techniques. FBG also compensates the dispersion very effectively in long-distance communication. Application/Improvements: Symmetric compensation is the best technique to reduce dispersion in all three dispersion compensation techniques. By using FBG, dispersion can be reduced effectively. These methods can be used in WDM systems to minimize errors and to improve performance.