High-speed all-optical and gate using nonlinear transmission of electroabsorption modulator

We investigated an all-optical logic AND operation at 10 Gb/s using nonline ar transmission of electroabsorption modulator pumped with two counterpropa gating data streams. The transmitted pump itself was used as the output of the optical gate to obtain high extinction ratio, and high-output peak powe rs. The gate has been tested using 2(31)-1 long pseudorandom bit sequence. The logical output of the gate has an extinction ratio of more than 10 dB w ith good eye opening. Our measurements of the gate transmission window show that all-optical logic operation up to 100 Gb/s is feasible.