DISPERSION COMPENSATION AND SNR ENHANCEMENT IN MULTI-GBPS WDM OPTICAL SYSTEMS USING MULTI STAGE EDFA

Abstract

Fiber optic systems are of the backbone to modern day communication networks. The high bandwidth and data rates provided by fiber optics con truly be utilized by employment of WDM (wavelength division multiplexing ) techniques. The WDM system are able to cater to a pleoethera of integrated broadband services combining voice, data, video, multimedia services and VAS (Value Added Services). WDM system long widely used in large distance lines suffers from problems such as a dispersion and attenuation which results degraded system performance. Dispersion compensation and optical power amplification are essential parameters in WDM systems. This work is about exploitation of ofmultistage EDFA( Erbium Doped Files Amplifier) system to enhance power and reduce dispersion and achieve higher SNR(Signal Noice Ratio) as composed to signal EDPA of some source power. It is also imperative that by placement of stogerof EDPA pre and post FBG, allow for an order of magnitude increase in SNR and achieve excellent DC (Dispersion Compensation) in WDM systems.