GaAs/AlGaAs Optical Interconnection Chip for Neural Network

An optical synaptic interconnection device has been fabricated using GaAs/AlGaAs technology. It consists of a light-emitting diode array, an interconnection matrix and a photodiode array, which are integrated in a hybrid-layered structure on a GaAs substrate. The LED array and PD array with good uniformity have been fabricated by molecular beame pitaxy (MBE). An multiple quantum well (MQW) active layer and Bragg reflector were employed to obtain high efficiency of the LED. The fabricated device was used to simulate a neural network system with 32 neurons. The associative memory was successfully implemented.