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Processing-Speed Enhancement in a Delay-Laser-Based Reservoir Computer by Optical Injection
- Source :
- Photonics, Vol 9, Iss 4, p 240 (2022)
- Publication Year :
- 2022
- Publisher :
- MDPI AG, 2022.
-
Abstract
- A delay-laser-based reservoir computer (RC) usually has its processing speed limited by the transient response of laser dynamics. Here, we study a simple all-optical approach to enhancing the processing speed by introducing optical injection to the reservoir layer of conventional RC that consists of a semiconductor laser with a delay loop. Using optical injection, the laser’s transient response effectively accelerates due to the speeded carrier-photon resonance. In the chaotic time-series prediction task, the proposed RC achieves good performance in a flexible range of injection detuning frequency under sufficient injection rate. Using proper injection parameters, the prediction error is significantly reduced and stabilized when using high processing speed. For achieving a prediction error below 0.006, the optical injection enhances the processing speed by an order of magnitude of about 5 GSample/s. Moreover, the proposed RC extends the advantage to the handwritten digit recognition task by achieving better word error rate.
Details
- Language :
- English
- ISSN :
- 23046732
- Volume :
- 9
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- Photonics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.48a88f267094481d85d01da7522cff0a
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/photonics9040240