Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 46: Precision Measurements and Metrology (Optical Clocks) (joint session Q/A)
A 46.3: Vortrag
Freitag, 9. März 2018, 11:00–11:15, K 2.013
An iodine frequency reference based on an ECDL at 1064 nm for a sounding rocket mission. — •Franz Balthasar Gutsch1, Klaus Döringshoff1, Vladimir Schkolnik1,2, Markus Krutzik1,2, Achim Peters1,2, and Team JOKARUS1,2,3,4,5 — 1Humboldt-Universität zu Berlin — 2Ferdinand-Braun-Institut, Berlin — 3ZARM, Uni Bremen — 4Johannes Gutenberg-Universität Mainz — 5Menlo Systems GmbH, Martinsried
Within the JOKARUS collaboration, we built a autonomously operating, active optical absolute frequency reference at 1064 nm based on molecular iodine that is scheduled for launch on a sounding rocket (TEXUS 54) in April 2018. Laser-based frequency references with high accuracy and stability are needed for space missions dedicated to precision tests of fundamental physics, Earth observation, navigation or gravitational wave astronomy. Frequency stabilization to the narrow, sub-MHz hyperfine transitions of the iodine R(56)32-0 line provides the means to fulfill the requirements of planned missions like LISA or NGGM. Our system relies on modulation transfer spectroscopy of iodine gas at 532 nm, using a frequency-doubled, micro-integrated, narrow-linewidth ECDL MOPA. In order to verify the lock stability, there will be an in-flight comparison to an RF-clock-referenced frequency comb. In this talk, we report on the system design, performance and results of environmental testing. Further, we present the auto-lock as well as our approach to experiment control. This work is supported by the DLR with funds provided by the Federal Ministry for Economic Affairs and Energy under grant number DLR 50WM 1646.