Optoelectronic Spike-Based Encoding Utilising a Photondetector Coupled to a Resonant Tunnelling Diode

Summary

This thesis presents the theory and measurement results on utilising resonant tunnelling diodes for spike-encoded quantisation, a method to convert an amplitude-modulated optical input signal amplitude to a discrete number of electrical spikes. I-V curves of the resonant tunnelling diodes have been measured and lifted to the Schulman I-V curve model. The dynamic response of the devices has also been observed and analysed, measruing a self-oscillation frequency of up to 69 MHz. Threshold-based pulse-induced spiking has been investigated, where excitability is shown in both forward and reverse bias Finally, the spike-encoded quantisation method has been demonstrated, where different input signal amplitudes are succesffully quantisised.鈥