Coherence time of a cold-atom laser below threshold
arXiv:2007.07798 · doi:10.1364/OL.402975
Abstract
We experimentally study the coherence time of a below-threshold Raman laser in which the gain medium is a gas of magneto-optically trapped atoms. The second-order optical coherence exhibits photon bunching with a correlation time which is varied by two orders of magnitude by controlling the gain. Results are in good agreement with a simple analytic model which suggests the effect is dominated by gain, rather than dispersion, in this system. Cavity ring-down measurements show the photon lifetime, related to the first-order coherence time, is also increased.
arXiv comment4 pages, 3 figures; minor changes in response to referee review; version accepted for publication in Optics Letters
References in corpus (17)
- Two-photon "ghost" imaging with thermal light
- Prospects for a mHz-linewidth laser
- Frequency measurements of superradiance from the strontium clock transition
- A Cold-Strontium Laser in the Superradiant Crossover Regime
- Intensity fluctuations in steady state superradiance
- Pulse delay time statistics in a superradiant laser with calcium atoms
- Lasing in the superradiant crossover regime
- Lasing on a narrow transition in a cold thermal strontium ensemble
- Mechanisms for Lasing with Cold Atoms as the Gain Medium
- Photon lifetime in a cavity containing a slow-light medium
- Cooperativity of a few quantum emitters in a single-mode cavity
- Directional bistability and nonreciprocal lasing with cold atoms in a ring cavity
- Collective strong coupling of cold potassium atoms in a ring cavity
- Anomalous ring-down effects and breakdown of the decay rate concept in optical cavities with negative group delay
- Continuous-wave virtual-state lasing from cold ytterbium atoms
- In-situ Raman gain between hyperfine ground states in a potassium magneto-optical trap
- Why material slow light does not improve cavity-enhanced atom detection