< Back to previous page

Publication

Delay-Based Reservoir Computing Using Multimode Semiconductor Lasers

Journal Contribution - Journal Article

Subtitle:Exploiting the Rich Carrier Dynamics
Delay-based reservoir computing is a neuromorphiccomputing technique employing a single nonlinear node, in this case a semiconductor laser subjected to a delayed optical self-feedback. This implementation of reservoir computing, while being versatile and highly performant, is limited in processing speed by the delay length. In an effort to reduce the required delay line length, while maintaining the same strong performance, we investigate if it is possible to distribute the processing power over more than
one longitudinal mode. We therefore have numerically analysed a rate equation model of a semiconductor laser with two longitudinal modes, delayed optical feedback and optical injection. Our modelling takes into account the carrier inversion moments that represent carrier gratings formed in the cavity during operation. This allows us to study the importance of modal interaction via carrier gratings and how this effects the computational power. We show that the setup with a dual-mode laser and an optimized
reservoir parameter space, can reduce the delay-line fourfold in comparison with a single-mode laser setup.
Journal: IEEE Journal on Selected Topics in Quantum Electronics
ISSN: 1077-260X
Issue: 6
Volume: 25
Pages: 1-9
Publication year:2019
CSS-citation score:2
Accessibility:Closed