Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 17: Quantum Optics (Miscellaneous) III
Q 17.1: Invited Talk
Tuesday, March 15, 2022, 10:30–11:00, Q-H14
Superradiant lasing in presence of atomic motion — •Simon B. Jäger1,2, Haonan Liu2, John Cooper2, and Murray J. Holland2 — 1Physics Department and Research Center OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA
Advances in time and frequency standards require the realization of extremely stable high-Q oscillators. For lasers this high-Q oscillator is usually a narrow-linewidth resonator mode while the laser linewidth is limited by fluctuations of the resonator length. Remarkably, these limitations can be softened by coupling many atoms to a rather broad-linewidth cavity mode and storing the coherence in the collective dipole of the atoms. In this superradiant regime, we discuss the effects of atomic motion resulting in inhomogeneous broadening of the emission frequencies. We show that the superradiant laser can overcome this broadening using a phase synchronization mechanism. Our theoretical analysis shows the possibility to build rugged, continuous-wave superradiant lasers based on a thermal atomic beam source. In addition, we study different superradiant phases that rely on Doppler effects where we observe polychromatic light emission and mode-hopping dynamics. We discuss the relevance of these effects for laser-based gyroscopes and sensors.