OPTICAL NOR GATE USING DIODE LASER SOURCES.

Optical logic elements, especially in the form of 2-D arrays, can possibly be applied to massively parallel signal processing. GaAs/AlGaAs multiple-quantum-well etalons have previously shown optical bistability and various types of logic-gate operation at room temperature. Most of these experiments have used a dye laser, which is large in size and expensive. One attractive feature of these devices is that a GaAs/AlGaAs diode laser can be used as a light source making the total system more practical. The paper demonstrates a stable optical NOR gate using two diode lasers.