Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 7: Präzisionsmessungen und Metrologie 3
A 7.5: Vortrag
Montag, 12. März 2012, 17:30–17:45, V7.03
An Ultra-Stable Iodine-Based Frequency Reference for Space Applications — •Anja Keetman1, Thilo Schuldt1, Klaus Döringshoff2, Matthias Reggentin2, Evgeny V. Kovalchuk2, Moritz Nagel2, Achim Peters2, and Claus Braxmaier1 — 1University of Applied Sciences Konstanz, Germany — 2Humboldt-University Berlin, Germany
We present the further development of an iodine-based optical frequency reference on elegant breadboard (EBB) level for future application in space. A frequency-doubled Nd:YAG laser is stabilized to a transition in molecular iodine using modulation transfer spectroscopy near 532 nm. For improving the frequency stability (by a higher pointing stability of the two counter-propagating laser beams in the iodine cell), and also for its future application in space, the optical setup for spectroscopy is realized on a thermally and mechanically ultra-stable baseplate made of a specific glass ceramics (Clearceram by OHARA). The optical components are fixed to the baseplate using adhesive bonding technology, which was already successfully demonstrated in the realization of a highly stable heterodyne interferometer, developed as a prototype demonstrator in the context of the LISA space mission. With the EBB setup, we aim for a frequency stability of 3*10−15 at an integration time of 1000 s, comparable to state-of-the-art iodine-based frequency references realized on laboratory level, e.g. at the Humboldt-University Berlin. This work is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number 50 QT 1102.