SAMOP 2023 – wissenschaftliches Programm
Q 59.39: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Development of Two Laboratory Two-Photon Frequency References — •Moritz Eisebitt1,2, Julien Kluge1,3, Daniel Emanuel Kohl1,3, Klaus Döringshoff1,3, and Markus Krutzik1,3 — 1Institut für Physik, Humboldt-Universität zu Berlin — 2II. Physikalisches Institut, RWTH Aachen University — 3Ferdinand-Braun-Insitut, Leibniz-Institut für Höchstfrequenztechnik
We present two laboratory monochromatic two-photon frequency references operating on the 5S1/2→ 5D5/2 transition in Rubidium utilising frequency modulation spectroscopy. Two-photon references with Rubidium have the benefit of a narrow linewidth and being inherently Doppler-free. The references have a combined fractional instability below 3·10−13/√τ up to 1000s. Efforts to stabilise the residual amplitude modulation are discussed as well as the performance and limits of the frequency reference induced by environmental effects. Measurements of the dipole, quadrupole and octupole hyperfine structure constants of Rb 5D5/2 are presented which surpass the precision of the current state of art values by an order of magnitude.
This work is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Climate Action (BMWK) due to an enactment of the German Bundestag under grant numbers 50RK19711, 50WM2164.