Distinct regeneration capability of 40 Gbit/s signal impaired with amplitude noise and timing jitter using SOA-based all-optical polarization discriminated switch

We firstly examined reshaping and retiming capability of an SOA-based polarization discriminated switch employing seriously impaired 40 Gbit/s control signal. it was confirmed that the reshaping function of the 3R regenerator contributed to broadening of the threshold-voltage window at the receiver by a factor of 2.1. The timing jitter of 8.5 ps imposed on the control pulse was almost completely corrected after the regeneration. Finally, the Q-factor of 14.9 dB for the control pulse, on which both amplitude noise and timing jitter were imposed, was improved to 15.6 dB after the regeneration. These results indicate that the all-optical 3R regenerator is promising for recovering the impairments of the high-bitrate signal directly in front of the receiver.