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Simultaneous Wavelength Preserving and Wavelength Converting Regeneration of NRZ DPSK Signal Using FWM in SOA

Anju Thomas, Prof.I.Muthumani

In this paper, simultaneous wavelength preserving and wavelength converting regeneration of non return-to-zero differential phase-shift-keying ( NRZ-DPSK )signals at 10 Gb/s is implemented using the principle of FWM in Semiconductor Optical Amplifier (SOA).Both four-wave-mixing (FWM) and pass-through signals are remarkably improved with respect to input data in terms of Q-factor and bit error rate(BER), demonstrating wavelength preserving and wavelength converting (Both Up and Down conversion) regeneration. In particular, the FWM signal exhibits better regenerative performance over a broader range of degraded input data and for lower input overall power levels.