Abstract

We have studied modification of the fluorescence spectra of a room-temperature atomic rubidium vapor in the region of $^{85}{\rm Rb}$ and $^{87}{\rm Rb}$ ${{\rm D}_2}$ lines while changing the temporal rate of linear (triangular) scanning of laser radiation frequency. An increase in the ramping speed over a certain value ($\approx {{10}^6}\;{\rm MHz/s}$) results in essential modification of magnitudes of individual atomic transitions, different on rising and falling slopes, which characterize transition from a steady-state interaction regime to a transient one. Our experimental results are very consistent with the developed theoretical model. The obtained results can be used for determination of atomic system parameters such as ground-state relaxation rate. Possible follow-up actions for the addressed control of atomic level population are discussed.

© 2019 Optical Society of America

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