Deep Time-Delay Reservoir Computing Using Cascading Optoelectronic-Feedback Lasers

Deep time-delay reservoir computing (TDRC) based on two electrical cascading optoelectronic-feedback semiconductor lasers (SLs) is proposed and numerically investigated. The reservoir of deep TDRC has two cascading layers. The coupling between two layers is electrical and unidirectional. Each layer consists of an SL under optoelectronic feedback. Chaotic time series prediction task is adopted to evaluate the performance of proposed deep TDRC. The results show that the prediction performance is more sensitive to the feedback strength and the coupling strength than the coupling delay time. By cascading of layers, the proposed deep TDRC effectively enhances the prediction performance.