40 Gb/s wavelength preserving polarization insensitive all-optical 3R regenerator utilizing Raman amplification, cross- and self-phase modulation, and offset filtering

All-optical 3R regeneration is demonstrated at 40 Gb/s that is wavelength-preserving and insensitive to the state of polarization of the input signal. The regenerator consists of retiming and reshaping stages that must be carefully co-designed.