All-optical regenerator based on nonlinear fibre Sagnac interferometer

For the first time, all-optical regeneration using a nonlinear fibre Sagnac interferometer switch (NSIS) and pump-probe walk-off is demonstrated. In the NSIS, all-optical regeneration including timing and amplitude restoration is performed by switching clock pulses with amplified input signals. Timing restoration is evaluated by performing error-rate measurements at 5 Gbit/s.