ALL-OPTICAL LOGIC GATES BASED ON CROSS-PHASE MODULATION IN A NONLINEAR FIBER INTERFEROMETER

We propose and demonstrate all-optical logic gates, performing all eight two-input Boolean functions (ON, AND, OR, XOR, NAND, NOR, XNOR, INV) in a two-wavelength nonlinear interferometer. With a 400 m long single-mode fiber loop, the required pump power was 0.13 W, 0.25 W, 0.38 W, and 0.38 W for AND (NAND), OR (NOR), XOR (XNOR), and ON (INV), respectively. The concept can be extended to provide single-wavelength cascadable operation with fan-out.