Threshold of a random laser based on Raman gain in cold atoms

Abstract

We address the problem of achieving a random laser with a cloud of cold atoms, in which gain and scattering are provided by the same atoms. In this system, the elastic scattering cross-section is related to the complex atomic polarizability. As a consequence, the random laser threshold is expressed as a function of this polarizability, which can be fully determined by spectroscopic measurements. We apply this idea to experimentally evaluate the threshold of a random laser based on Raman gain between non-degenerate Zeeman states and find a critical optical thickness on the order of 200, which is within reach of state-of-the-art cold-atom experiments.

References in corpus (5)

• Strong Interactions in Multimode Random Lasers
• Supporting Online Material for "Strong Interactions in Multimode Random Lasers"
• Dynamic light diffusion, Anderson localization and lasing in disordered inverted opals: 3D ab-initio Maxwell-Bloch computation
• Mechanisms for Lasing with Cold Atoms as the Gain Medium
• Threshold of a Random Laser with Cold Atoms

Cited by in corpus (12)

• A cold-atom random laser
• Microscopic Theory of Scattering of Weak Electromagnetic Radiation by a Dense Ensemble of Ultracold Atoms
• Near-resonance Light Scattering from a High-density, Ultracold Atomic ${}^{87}$Rb Gas
• Dispersion of the dielectric permittivity of dense and ultracold atomic gases
• Spatial distribution of optically induced atomic excitation in a dense and cold atomic ensemble
• A scaling law for light scattering from dense and cold atomic ensembles
• Towards a random laser with cold atoms
• Field and intensity correlations: the Siegert relation from stars to quantum emitters
• Quantum hologram of macroscopically entangled light via the mechanism of diffuse light storage
• Albedo and laser threshold of a diffusive Raman gain medium
• Raman process under condition of radiation trapping in a disordered atomic medium
• Fluctuation properties of laser light after interaction with an atomic system: comparison between two-level and multilevel atomic transitions