Cascaded All-Optical Operations in a Hybrid Integrated 80-Gb/s Logic Circuit

We demonstrate all-optical logic functionalities in a high-speed all-optical logic circuit based on differential Mach-Zehnder interferometers with semiconductor optical amplifiers as the nonlinear optical elements. The circuit, implemented by hybrid integration of the semiconductor optical amplifiers on a planar lightwave circuit platform fabricated in silica glass, can be flexibly configured to realize a variety of Boolean logic gates. We present both simulations and experimental demonstrations of cascaded alloptical operations for 80-Gb/s on-off keyed data.