ESTIMATION OF NOISE FIGURE USING GFF WITH HYBRID QUAD PUMPING

This Paper describes the models and simulation of EDFA(Erbium Doped Fiber Amplifier) with optimized Gain and that has been flattened using GFF(Gain flattening Filter) with reduced noise figure using Hybrid Quad Pumping with the wavelengths 980nm and 1480nm oppositely cascaded (Co directional pumping and counter directional pumping) architectures a nd compares the results with EDFA with dual pumping techniques. In DWDM networks EDFA’S are an imperative element and are regarded as a cost effective replacement of classical optoelectronic regenerative repeaters EDFA plays an important role in improvement of performance of optical fiber transmission systems. The proposed model consists of Input source, pumping sources with the wavelengths 980nm, 1480nm connected cascade in opposite sides and Isolator. The Erbium doped fibre amplifier’s gain which appears in the signal to noise ratio expression is computed from the simulation. The resulting models accurately represent EDFA flattened gain dynamics and reduced noise figure. Simulation results EDFA with Hybrid quad pumping model1 with first stage of the wavelengths 980nm twice times and in the second stage 1480nm twice a times show a flattened maximum gain of 5.4DB and noise figure of 7.6 db and EDFA with Hybrid quad pumping model2 with first stage of the wavelengths 980nm and 1480nm and in the second stage 1480nm and 980nm show a flattened maximum gain of 5.3 DB and noise figure of 8.4db. This is applicable in Network reconfiguration and Multi -vendor networks and also addition new services and wavelengths.