Effects of Some Operation Parameters on the Performance of a Reservoir Computing System Based on a Delay Feedback Semiconductor Laser With Information Injection by Current Modulation

• Published in: IEEE access Vol. 7; pp. 128767 - 128773
• Main Authors: Yue, Dian-Zuo, Wu, Zheng-Mao, Hou, Yu-Shuang, Xia, Guang-Qiong
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bias; Current modulation; delay feedback; Delays; Feedback; Modulation; Nonlinear optics; Optical attenuators; Optical feedback; Parameters; Performance prediction; prediction performance; Reservoir computing; Reservoir performance; Reservoirs; Santa Fe time series; semiconductor laser; Semiconductor lasers; Threshold currents
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2019.2938552

Via a Santa Fe time series prediction task, the performance of a reservoir computing (RC) system based on a delay feedback semiconductor laser (SL) under current modulation is experimentally investigated and evaluated in detail. Experimental results show that some key operation parameters including the modulation index, the feedback ratio and the SL bias current, seriously affect the prediction performance of this RC system. By optimizing parameter settings, the degradation of the RC performance with the increase of the SL bias current can be efficiently alleviated, and the RC system can still realize a good performance with a NMSE smaller than 0.1 even for the SL biased at a high level of three times threshold current <inline-formula> <tex-math notation="LaTeX">{I} _{th} </tex-math></inline-formula>. This research is an improvement to a previously experimental report in which such RC system can achieve a good performance only under a SL bias level near <inline-formula> <tex-math notation="LaTeX">{I} _{th} </tex-math></inline-formula>.