Abstract:
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.
Keywords: All-optical regeneration, differential phase shift keying, four-wave-mixing (FWM), semiconductor optical amplifiers (SOAs), wavelength conversion