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Contagious photons: Laser dynamics and the susceptible-infected-recovered model

par Kozyreff, Gregory ;Erneux, Thomas
Référence Physical Review E, 108, 024218
Publication Publié, 2023-08-22

Article révisé par les pairs

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Résumé :

We explore a complete analogy between the classic susceptible-infected-recovered epidemiological model with natural birth and death rates, and class-B laser equations. As a result, recently derived asymptotic formulas in the former context can be used to describe the switch-on intensity pulse of a laser suddenly brought well above the lasing threshold, as in active Q-switching. Conversely, the well-studied laser relaxation oscillations find a companion behavior in epidemiology, emphasizing nontrivial timescales. Finally, we discuss the possible correspondence between multistrain outbreaks and multimode lasing.