A Cold-Strontium Laser in the Superradiant Crossover Regime

Abstract

Recent proposals suggest that lasers based on narrow dipole-forbidden transitions in cold alkaline earth atoms could achieve linewidths that are orders of magnitude smaller than linewidths of any existing lasers. Here, we demonstrate a laser based on the 7.5 kHz linewidth dipole forbidden ${}^3$P${}_1$ to ${}^1$S${}_0$ transition in laser-cooled and tightly confined ${}^{88}$Sr. We can operate this laser in the bad-cavity regime, where coherence is primarily stored in the atoms, or continuously tune to the more conventional good-cavity regime, where coherence is primarily stored in the light field. We show that the cold-atom gain medium can be repumped to achieve quasi steady-state lasing, and demonstrate up to an order of magnitude suppression in the sensitivity of laser frequency to changes in cavity length, the primary limitation for the most frequency stable lasers today.

5 pages, 4 figures

References in corpus (6)

• LIGO: The Laser Interferometer Gravitational-Wave Observatory
• Spectroscopic observation of SU(N)-symmetric interactions in Sr orbital magnetism
• Mechanisms for Lasing with Cold Atoms as the Gain Medium
• Relaxation oscillations, stability, and cavity feedback in a superradiant Raman laser
• Strong Coupling on a Forbidden Transition in Strontium and Nondestructive Atom Counting
• Observation of Motion Dependent Nonlinear Dispersion with Narrow Linewidth Atoms in an Optical Cavity

Cited by in corpus (63)

• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• Frequency measurements of superradiance from the strontium clock transition
• Pulse delay time statistics in a superradiant laser with calcium atoms
• Emergent dark states from superradiant dynamics in multilevel atoms in a cavity
• Lasing in the superradiant crossover regime
• Lasing on a narrow transition in a cold thermal strontium ensemble
• Nonreciprocal Superradiant Phase Transitions and Multicriticality in a Cavity QED System
• Rugged mHz-Linewidth Superradiant Laser Driven by a Hot Atomic Beam
• Theoretical study of early time superradiance for atom clouds and arrays
• Phase Synchronization between Two Superradiant Lasers
• Monte-Carlo Simulations of Superradiant Lasing
• Magnetically-Induced Optical Transparency on a Forbidden Transition in Strontium for Cavity-Enhanced Spectroscopy
• On-Line Estimation of Local Oscillator Noise and Optimisation of Servo Parameters in Atomic Clocks
• Quantum trajectories of dissipative time-crystals
• Collective Radiance Effects in the Ultrastrong Coupling Regime
• Steady-state spin synchronization through the collective motion of trapped ions
• Magnetic Field-controlled Transmission and Ultra-narrow Superradiant Lasing by Dark Atom-light Dressed States
• Subradiant-to-Subradiant Phase Transition in the Bad Cavity Laser
• Squeezed lasing
• Collective strong coupling of cold potassium atoms in a ring cavity
• Dynamics of bad-cavity enhanced interaction with cold Sr atoms for laser stabilization
• Quantum Langevin approach for superradiant nanolasers
• Observation of Blackbody Radiation Enhanced Superradiance in ultracold Rydberg Gases
• Superradiant lasing in inhomogeneously broadened ensembles with spatially varying coupling
• Driven-Dissipative Dynamics of Atomic Ensembles in a Resonant Cavity I: Nonequilibrium Phase Diagram and Periodically Modulated Superradiance
• Resonant light enhances phase coherence in a cavity QED simulator of fermionic superfluidity
• Stability analysis for bad cavity lasers using inhomogeneously broadened spin-1/2 atoms as gain medium
• A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
• Lasing by driven atoms-cavity system in collective strong coupling regime
• Superradiant emission of a thermal atomic beam into an optical cavity
• Prospects for a bad cavity laser using a large ion crystal
• Superradiant optomechanical phases of cold atomic gases in optical resonators
• Topological quantum synchronization of fractionalized spins
• Active Frequency Measurement on Superradiant Strontium Clock Transitions
• Cavity-immune features in the spectra of superradiant crossover laser pulses
• Regular and bistable steady-state superradiant phases of an atomic beam traversing an optical cavity
• Continuous multi-step pumping of the optical clock transition in alkaline-earth atoms with minimal perturbation
• Prospects of a superradiant laser based on a thermal or guided beam of Sr-88
• Continuous-wave virtual-state lasing from cold ytterbium atoms
• Superradiance-induced multistability in driven Rydberg lattice gases
• Superradiant laser: Effect of long-ranged dipole-dipole interaction
• Quantum resonant optical bistability with a narrow atomic transition: bistability phase diagram in the bad cavity regime
• Modeling of a continuous superradiant laser on the sub-mHz ${}^1$S${}_0\to {}^3$P${}_0$ transition in neutral strontium-88
• Nonreciprocal interactions induce frequency shifts in superradiant lasers
• Magnetically Induced Optical Transparency With Ultra-Narrow Spectrum
• Continuous narrowband lasing with coherently driven V-level atoms
• Coherence-Assisted Superradiant Laser with Hz Linewidth and $10^{-10}$W Power
• Collective emission of an atomic beam into an off-resonant cavity mode
• Fully Collective Superradiant Lasing with Vanishing Sensitivity to Cavity Length Vibrations
• Slow Light Frequency Reference Cavities -- Proof of Concept for Reducing the Frequency Sensitivity Due to Length Fluctuations
• Correlations and linewidth of the atomic beam continuous superradiant laser
• Relaxation of an ensemble of two-level emitters in a squeezed bath
• Coupling atoms to cavities with narrow linewidth optical transitions: Applications to frequency metrology
• A superradiant two-level laser with intrinsic light force generated gain
• Coherence time of a cold-atom laser below threshold
• Mean-field Floquet theory for a three-level cold-atom laser
• A Generalized Schawlow-Townes Limit
• Exceptional Point Superradiant Lasing with Ultranarrow Linewidth
• Perturbation approach in Heisenberg equations for lasers
• Increased output of superradiant light-emitting diodes due to population fluctuations
• Robustness of the Floquet-assisted superradiant phase and possible laser operation
• Floquet Engineering of Non-Equilibrium Superradiance
• Observation of electric field induced superradiance slowdown in ultracold Rydberg atomic gases