Repumping ground-state population in a coherently driven atomic resonance

TL;DR

This paper presents an experimental optical pumping method that enhances the transparency contrast in rubidium vapor by selectively populating specific ground states, improving atomic resonance applications.

Contribution

It introduces a novel optical pumping technique leveraging selection rules to efficiently pump atoms into specific ground states, enhancing coherent population trapping signals.

Findings

Increased transparency contrast in rubidium vapor CPT signals.

Effective population transfer into mF=0 ground states.

Potential improvements for atomic clock performance.

Abstract

We experimentally demonstrate an optical pumping technique to pump a dilute rubidium vapor into the mF = 0 ground states. The technique utilizes selection rules that forbid the excitation of the mF = 0 state by linearly-polarized light. A substantial increase in the transparency contrast of coherent population trapping in the clock transition is demonstrated.