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Authors: E.J.C. Gooskens, F. Laporte, C. Ma, S. Sackesyn, P. Bienstman
Title: Wavelength Dimension in Waveguide-Based Photonic Reservoir Computing
Format: International Journal
Publication date: 4/2022
Journal/Conference/Book: Optics Express
Editor/Publisher: OSA, 
Volume(Issue): 30(9) p.15634-15647
DOI: 10.1364/OE.455774
Citations: 8 ( - last update: 16/6/2024)
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Existing work on coherent photonic reservoir computing (PRC) mostly concentrates on single-wavelength solutions. In this paper, we discuss the opportunities and challenges related to exploiting the wavelength dimension in integrated photonic reservoir computing systems. Different strategies are presented to be able to process several wavelengths in parallel using the same readout. Additionally, we present multiwavelength training techniques that allow to increase the stable operating wavelength range by at least a factor of two. It is shown that a single-readout photonic reservoir system can perform with ≈0% BER on several WDM channels in parallel for bit-level tasks and nonlinear signal equalization. This even when taking manufacturing deviations and laser wavelength drift into account.

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