SAMOP 2023 – wissenschaftliches Programm
Q 51.8: Vortrag
Donnerstag, 9. März 2023, 16:15–16:30, A320
Towards a Spaceborne Two-Photon Rubidium Frequency Reference — •Julien Kluge1,2, Klaus Döringshoff1,2, Daniel Emanuel Kohl1,2, Moritz Eisebitt2,3, and Markus Krutzik1,2 — 1Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik — 2Institut für Physik, Humboldt-Universität zu Berlin — 3II. Physikalisches Institut, RWTH Aachen University
Optical frequency standards based on two-photon spectroscopy using hot rubidium vapor are a promising candidate for realization of simple and compact optical clocks for application in next generation global navigation satellite systems.
In this presentation, we show the development of a two-photon frequency reference using FM spectroscopy at 778 nm for application in the CRONOS satellite mission. Recent results of our lab-based setups show a fractional instability below 3× 10−13 per τ−1/2 for up to 1000 s. We present our design and first prototype of a spectroscopy module with a volume below 1/2 l, weight below one kilogramm and planned power budget of under 10 W for accommodation on a micro satellite. Additionally, reports on its performance and qualification for an in orbit verification mission are given. We further provide details on the architecture of the payload, the laser system for two-photon spectroscopy and the anticipated operation as part of an optical clock.
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.