Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster VII
Q 56.27: Poster
Donnerstag, 14. März 2024, 17:00–19:00, KG I Foyer
Towards a Miniaturized Spaceborne Rubidium Two-Photon Frequency Reference — •Daniel Emanuel Kohl1,2, Julien Kluge1,2, Moritz Eisebitt1,2, Klaus Döringshoff1,2, Nicolas Manrique1,2, and Markus Krutzik1,2 — 1Institut für Physik - Humboldt-Universität zu Berlin — 2Ferdinand-Braun-Institut (FBH), Leibniz-Institut für Höchstfrequenztechnik
We present the development of a miniaturized rubidium two-photon frequency reference using the 5S1/2 → 5D5/2 transition at 778.1 nm, developed as a part of the CRONOS project. The project’s goal is to demonstrate a micro-satellite-based optical clock in low earth orbit. Optical frequency standards based on frequency modulation spectroscopy of atomic vapor are a promising candidate for realization of compact optical clocks for application in next generation global navigation satellite systems. Rubidium offers a 300 kHz linewidth two-photon transition accessable with inherently Doppler free spectroscopy.
We show a prototype of a compact spectroscopy module achieving fractional frequency instabilities in the regime of 10−13 / √τ. The design comprises a projected volume below 0.5 l, mass below 1 kg and a power consumption below 10 W. Further we present first results of the utilization of MEMS rubidium vapor cells to reduce the size weight and power budget of the spectroscopy module.
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 50RK1971, 50WM2164.
Keywords: Clock; Frequency Reference; Rubidium; Two-Photon; Space