Multi-dressing time delayed fourth- and sixth-order fluorescence processes in Pr3+:YSO

Abstract

We report the multi-dressing time delayed fluorescence processes in a Pr³⁺:YSO crystal, which have been investigated both theoretically and experimentally. The time delay of fluorescence processes can be controlled by the dressing effect which can be adjusted by the power or detuning of laser fields. In addition, we investigate the spectrum of the fluorescence signal at four different stages in the time domain. Specifically, there exists competition between fluorescence and spontaneous parametric four-wave mixing (SP-FWM), which can be separated due to the dressing effect. The experimental results can be well explained by the theoretical model.