Dynamics of bad-cavity enhanced interaction with cold Sr atoms for laser stabilization

Abstract

Hybrid systems of cold atoms and optical cavities are promising systems for increasing the stability of laser oscillators used in quantum metrology and atomic clocks. In this paper we map out the atom-cavity dynamics in such a system and demonstrate limitations as well as robustness of the approach. We investigate the phase response of an ensemble of cold strontium-88 atoms inside an optical cavity for use as an error signal in laser frequency stabilization. With this system we realize a regime where the high atomic phase-shift limits the dynamical locking range. The limitation is caused by the cavity transfer function relating input field to output field. However, the cavity dynamics is shown to have only little influence on the prospects for laser stabilization making the system robust towards cavity fluctuations and ideal for the improvement of future narrow linewidth lasers.

10 pages, 7 figures

References in corpus (8)

• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• 8E-17 fractional laser frequency instability with a long room-temperature cavity
• A Cold-Strontium Laser in the Superradiant Crossover Regime
• Active Faraday optical frequency standards
• Active optical frequency standard using sequential coupling of atomic ensembles
• On-Line Estimation of Local Oscillator Noise and Optimisation of Servo Parameters in Atomic Clocks
• Non-linear Spectroscopy of Sr Atoms in an Optical Cavity for Laser Stabilization
• Observation of Motion Dependent Nonlinear Dispersion with Narrow Linewidth Atoms in an Optical Cavity

Cited by in corpus (10)

• Lasing on a narrow transition in a cold thermal strontium ensemble
• Cavity-QED determination of the natural linewidth of the ${}^{87}$Sr millihertz clock transition with 30$\mu$Hz resolution
• Realization of phase locking in good-bad-cavity active optical clock
• Quantum Langevin approach for superradiant nanolasers
• Superradiant emission of a thermal atomic beam into an optical cavity
• Oscillator laser model
• Population fluctuation mechanism of the super-thermal photon statistic of LEDs with collective effects
• Increased output of superradiant light-emitting diodes due to population fluctuations
• Perturbation approach in Heisenberg equations for lasers
• Entanglement between distant atoms mediated by a hybrid quantum system consisting of superconducting flux qubit and resonators