Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster VII

Q 56.40: Poster

Thursday, March 14, 2024, 17:00–19:00, KG I Foyer

Progress towards a continuous wave superradiant Calcium Laser — •David Nak and Andreas Hemmerich — Institut für Quantenphysik, Universität Hamburg, Hamburg, Deutschland

Superradiant Lasers are suitable as light sources with ultralow bandwidth, as their emission frequency is only weakly dependent on an eigenfrequency of the laser cavity. They can be used as a read-out tool for precise optical atomic clocks. Currently, our experiment loads cold Calcium-40 atoms from a magneto optical trap into a one-dimensional optical lattice prepared inside a cavity. By incoherent population of the metastable triplet state, pulsed superradiant emission on the intercombination line was realized [1].

We will present our progress with the advancement of our bichromatic MOT and our incoherent repumping protocol, which will enable us to maintain the superradiant state for an extended period of time.

[1] T. Laske, H. Winter, and A. Hemmerich, Pulse Delay Time Statistics in a Superradiant Laser with Calcium Atoms, Phys. Rev. Lett. 123, 103601 (2019).

Keywords: Superradiant Laser; Superradiance; Active Atomic Clock; Alkaline Earth-like; Bichromatic MOT