SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Poster II

Q 22.42: Poster

Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof

A narrow linewidth and high power lasersystem for dual-species atom interferometry — •Wei Liu, Alexander Herbst, Henning Albers, Ashwin Rajagopalan, Knut Stolzenberg, Sebastian Bode, Ernst.M. Rasel, and Dennis Schlippert — Leibniz Universität Hannover, Institut für Quantenoptik

The universality of free fall is one of the foundations of general relativity, which can be tested by observing the free falling of different test masses. The development of atom optics has allowed performing of quantum tests with dual-species atom interferometers. However trapping and cooling of different atomic species require lasers with different wavelengths, resulting in large and complex laser systems.

We present a new laser system capable of trapping and cooling ³⁹K, ⁴¹K and ⁸⁷Rb. The system features high power and low maintenance by using frequency doubled C-band fiber lasers. We replace 11 external-cavity diode lasers and 8 tapered amplifiers with only 6 fiber lasers, remove all optical active components except acousto- and electro- optic modulators, and therefore simplify the laser system. On this poster we will describe the optical set up, characterisation measurements and the scheme of frequency stabilisation.