Prediction performance of reservoir computing system based on a semiconductor laser subject to double optical feedback and optical injection

Abstract

A reservoir computing (RC) system based on a semiconductor laser (SL) with double optical feedback and optical injection is proposed, and the prediction performance of such a system is numerically investigated via Santa Fe Time-Series Prediction task. The simulation results indicate that the RC system can yield a good prediction performance. Through optimizing some relevant operating parameters, ultra-fast information processing rates up to Gb/s level can be realized for the prediction error is below 3%.

Enhanced performances of a photonic reservoir computer based on a single delayed quantum cascade laser

“…4. They clearly indicate that the NMSE and the SER dramatically increase near ω 0 T 1 as previously reported for conventional semiconductor lasers [11,12]. We conclude that both the relatively low values of the carrier lifetimes and the absence of an injected signal from a master laser contribute to the good performances of our QCL system.…”

“…We now contrast these results to the case of a QCL that is subject to both injection and feedback as previously done for edge-emitting or ring lasers [4][5][6][10][11][12]27]. The results are shown by the square symbols in Fig.…”

“…A stable steady state allows the best RC performances. These performances, however, strongly depend on the static feedback phase ω 0 T , which is difficult to control in practice [11,12]. ω 0 is the free-running slave laser optical frequency, and T is the delay of the feedback.…”

“…This prediction performance is the best obtained for photonic delay based RC systems when noise is taken into account. The value of Θ 10 or 20 ps is not particularly relevant since good results have been obtained for other laser-based RC systems using different values of Θ [5,6,[10][11][12]27]. For example, a NMSE of 8.3 × 10 −3 has been found for Θ ≤ 20 ps in [12].…”

Recent advances in physical reservoir computing: A review

“…The effects of detuning of the frequency between an injection laser and the reservoir laser as well as the locking of the laser state were studied for a chaotic time series prediction task. Moreover, very recently a system with two optical feedback loops was studied numerically for a time series prediction task with an information processing rate of 1 GB/s (Hou et al, 2018). Performance was improved over a single loop configuration owing to the rich dynamics.…”