All-optical timing extraction with simultaneous optical demultiplexing from 40 Gb/s using a single electroabsorption modulator

We demonstrate a technique for performing optical time-division demultiplexing with simultaneous all-optical timing extraction using a single electroabsorption modulator (EAM). The technique is based on time-dependent transmission of the all-optically controlled EAM using a counterpropagation scheme between the data and clock optical pulses. The extracted timing is used in a feedback configuration to recover the optical clock. The bit error ratio measurement for demultiplexing from 40 Gb/s (4*10 Gb/s, 2/sup 31/-1 pseudorandom bit sequence) to 10 Gb/s showed an error-free operation with a 3.2-dB power penalty. The recovered clock-timing jitter is less than 200 fs.