Nonlinear processes responsible for mid-infrared and blue light generation in alkali vapours

TL;DR

This paper investigates the nonlinear wave mixing processes in rubidium vapour that lead to the generation of blue and mid-infrared light through frequency up- and down-conversion at low laser intensities.

Contribution

It provides an analysis of the spatial and temporal properties of the generated light to identify the nonlinear processes involved.

Findings

Identification of specific nonlinear processes responsible for light generation.

Characterization of the properties of blue and mid-IR light in rubidium vapour.

Insights into the efficiency of frequency conversion processes.

Abstract

The nonlinear processes responsible for frequency up- and down-conversion of resonant low-intensity laser radiation in Rb vapour have been evaluated from the spatial and temporal properties of blue and mid-IR light resulting from wave mixing.