Demonstration of Field Trial Experiments to Investigate the Cascadability of a 10 Gb/s Optical 3R Regenerator with All-optical Clock Recovery

We demonstrate field trial experiments to evaluate a 10-Gb/s optical 3R regenerator using fiber recirculation loops built with 264-km and 462-km SSMF fiber in field. Error-free transmission over 264,000-km with 1,000 optical 3R regeneration stages has been achieved. Experimental results indicate only 1.5-dB power penalty at BER 10-9 after 264,000-km.