Resonant properties of the memory capacity of a laser-based reservoir computer with filtered optoelectronic feedback

We provide a comprehensive analysis of the resonant properties of the memory capacity of a reservoir computer based on a semiconductor laser subjected to time-delayed filtered optoelectronic feedback. Our analysis reveals first how the memory capacity decreases sharply when the input-data clock cycl...

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Bibliographic Details
Published in:Chaos (Woodbury, N.Y.) N.Y.), 2023-11, Vol.33 (11)
Main Authors: Danilenko, G. O., Kovalev, A. V., Viktorov, E. A., Locquet, A., Citrin, D. S., Rontani, D.
Format: Article
Language:English
Subjects:
Damping capacity
Feedback
Filtration
Laser applications
Lasers
Optoelectronics
Physics
Reservoirs
Resonance
Semiconductor lasers
Stability analysis
Time lag
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Summary:We provide a comprehensive analysis of the resonant properties of the memory capacity of a reservoir computer based on a semiconductor laser subjected to time-delayed filtered optoelectronic feedback. Our analysis reveals first how the memory capacity decreases sharply when the input-data clock cycle is slightly time-shifted from the time delay or its multiples. We attribute this effect to the inertial properties of the laser. We also report on the damping of the memory-capacity drop at resonance with a decrease of the virtual-node density and its broadening with the filtering properties of the optoelectronic feedback. These results are interpretated using the eigenspectrum of the reservoir obtained from a linear stability analysis. Then, we unveil an invariance in the minimum value of the memory capacity at resonance with respect to a variation of the number of nodes if the number is big enough and quantify how the filtering properties impact the system memory in and out of resonance.
ISSN:1054-1500
1089-7682
DOI:10.1063/5.0172039