Descripció del projecte
In this project, the candidate will analyze, both theoretically and experimentally, the dynamics of a high speed Quantum Entropy Sources (QES) based on an Indium Phosphide (InP) Photonic Integrated Circuit (PIC), with the main objective of understanding the best regime to operate it and obtaining an adequate metrological model of the random signals measured in the devices. The results of the thesis will be used in the design and fabrication of future QES in InP with optimized speed and entropy generation rate.
In the first part of the project the student will develop a theoretical model based on rate equations of a system of two weakly coupled semiconductor lasers modulated in gain switching, including the development of the necessary algorithms to solve and analyze the dynamics of the lasers, in particular relaxation oscillations, turn-on delay and evolution of the optical phase.
This will be combined with experimental measurements of the dynamics using an InP QES at Quside’s laboratory. These measurements will be carried out in different operating regimes (current, frequency, delay) and fitted with the theoretical model to obtain the best operating conditions for our QES, with focus on maximizing its entropy generation rate. Finally, a metrological model will be developed in to measure and estimate the amount of extractable entropy of our devices.
