An optoelectronic implementation of a modified FitzHugh–Nagumo neuron model is proposed, analyzed, and experimentally demonstrated. The setup uses linear optics and linear electronics for implementing an optical wavelength-domain nonlinearity. The system attains instability through a bifurcation mechanism present in a class of neuron models, a fact that is shown analytically. The implementation exhibits basic features of neural dynamics including threshold, production of short pulses (or spikes), and refractoriness.
© 2007 Optical Society of America
Original Manuscript: April 25, 2006
Revised Manuscript: February 21, 2007
Manuscript Accepted: April 11, 2007
Published: July 6, 2007
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics
Alexandre R. S. Romariz and Kelvin H. Wagner, "Tunable vertical-cavity surface-emitting laser with feedback to implement a pulsed neural model. 1. Principles and experimental demonstration," Appl. Opt. 46, 4736-4745 (2007)