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Q: Fachverband Quantenoptik und Photonik
Q 49: Poster – Photonics, Lasers, and Applications
Q 49.36: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Implementation of a laser system for alkali vapor MEMS cell activation — •Janice Wollenberg1, Julien Kluge1,2, Daniel Emanuel Kohl1, Andreas Thies2, Klaus Döringshoff1,2, and Markus Krutzik1,2 — 1Institut für Physik - Humboldt-Universität zu Berlin — 2Ferdinand-Braun-Institut(FBH), Leibniz-Institut für Höchstfrequenztechnik
We present a laser system designed for the activation and characterization of rubidium vapor MEMS cells. Utilizing these mm-scale cells is a cruicial step towards chip-scale optical frequency references based on two-photon spectroscopy of rubidium at 778 nm. Our approach involves employing a high-power laser at 1064 nm to activate a rubidium dispenser pill, which is contained in one of the MEMS cells chambers. After activation, the pill releases elementary rubidium and micro-channels guide the rubidium vapor into a second chamber for spectroscopy. We use Doppler-free saturation spectroscopy of the D2 transition at 780 nm to characterize the cells. The outcomes of this work are expected to help produce rubidium cells for optical clocks. This involves further refinement and testing cell geometries, channel configurations, and relevant cell parameters, as well as the implementation of automated setup processes. 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, 50WM2169.
Keywords: rubidium; two-photon spectroscopy; MEMS cell