Mechanisms for Lasing with Cold Atoms as the Gain Medium

TL;DR

This paper demonstrates a laser using cold rubidium atoms as the gain medium, exploring three emission regimes—Mollow, Raman, and Four Wave Mixing—and characterizes their properties and output power.

Contribution

It introduces a novel cold-atom laser system with multiple emission regimes and provides detailed measurements of their properties and performance.

Findings

Achieved up to 300 μW output power

Identified three distinct laser emission regimes

Characterized properties of each emission mechanism

Abstract

We realize a laser with a cloud of cold rubidium atoms as gain medium, placed in a low-finesse cavity. Three different regimes of laser emission are observed corresponding respectively to Mollow, Raman and Four Wave Mixing mechanisms. We measure an output power of up to 300 $\mu$W and present the main properties of these different lasers in each regime.