Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.93: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
High performance iodine frequency reference aiming at a stability of 1× 10−15 — •Klaus Döringshoff, Katharina Möhle, Moritz Nagel, Evgeny V. Kofvalchuk, and Achim Peters — Humboldt-Universität zu Berlin, Institut für Physik, AG Optische Metrologie, Newtonstr. 15, 12489 Berlin
Future space missions, including the Laser Interferometer Space Antenna (LISA), rely on laser systems with high frequency stability over long time scales. Hyperfine-resolved optical transitions in molecular iodine (I2) could provide stable references for space missions, but also for terrestrial applications. The narrow linwidth of the hyperfine components (≈ 300 kHz) at 532 nm and strong absorption coefficient in combination with intrinsically stable frequency doubled Nd:YAG lasers allow for the realization of highly frequency stable, reliable and practical secondary frequency standards. Here we present our iodine frequency reference for the validation of tunable optical frequency references for the spaceborne gravitational wave detector LISA. For absolute frequency stabilization the frequency doubled output of a 1064 nm Nd:YAG laser is stabilized to the a10 component of the R(56)32-0 transition of 127I2. Using a 80 cm iodine cell and the MTS technique a frequency stability of 1 × 10−14 at 1 s and 5 × 10−15 at 100 s integration time is achieved. We present our efforts aiming at a frequency stability of 1 × 10−15 at averaging times of 1000 s.
This work is supported the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50OQ0601.