Stuttgart 2012 – wissenschaftliches Programm
Q 34.85: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II
High performance iodine frequency reference — •Matthias Reggentin1, Klaus Döringshoff1, Moritz Nagel1, Evgeny V. Kovalchuk1, Thilo Schuldt2, Anja Keetman2, Claus Braxmaier2, and Achim Peters1 — 1Humboldt-Universität zu Berlin, Institut für Physik, AG Optische Metrologie, Newtonstr. 15, 12489 Berlin — 2University of Applied Sciences Konstanz (HTWG), Institute of Optical Systems, 78462 Konstanz
Frequency references based on hyperfine-resolved molecular transitions in molecular iodine (127I2) can provide high long-term stability required for future space missions like the Laser Interferometer Space Antenna (LISA).
For this purpose we stabilize a frequency doubled 1064 nm Nd:YAG laser to the a10 component of the R(56)32-0 transition of 127I2 by applying Modulation Transfer Spectroscopy. Using a 80 cm long iodine cell within our setup we have achieved a frequency stability of 2×10−14 at 1 s and 3×10−15 between 50...5000 s. We discuss the recent progress in improving the laboratory setup and in evaluating further limitations and influences on its frequency stability by studying selected subsystems and components. Furthermore we present investigations for the development of a semi-monolithic setup based on adhesive bonded ceramics providing compactness and high thermal as well as mechanical stability.
This work is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant numbers 50 QT 1102 and 50 OQ 0601.