Space-borne frequency comb metrology
Optica, vol. 3, no. 12, pp. 1381-1387 (2016).
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Precision time references in space are of major importance to satellite-based fundamental science, global satellite navigation, earth observation, and satellite formation flying. Here we report on the operation of a compact, rugged, and automated optical frequency comb setup on a sounding rocket in space under microgravity. The experiment compared two clocks, one based on the optical D2 transition in Rb, and another on hyperfine splitting in Cs. This represents the first frequency comb based optical clock operation in space, which is an important milestone for future satellite-based precision metrology. Based on the approach demonstrated here, future space-based precision metrology can be improved by orders of magnitude when referencing to state-of-the-art optical clock transitions.
1 Menlo Systems GmbH, Am Klopferspitz 19a, 82153 Martinsried, Germany
2 Max Planck Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85741 Garching, Germany
3 Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr. 15, 12489 Berlin, Germany
4 Ferdinand-Braun-Institut, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
5 Universität Hamburg, Institut für Laserphysik, Luruper Chaussee 149, 22761 Hamburg, Germany
6 Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
7 Airbus Defence and Space GmbH, Center Trauen, Eugen-Sänger-Str. 23, 29328 Fassberg, Germany
(120.4640) Optical instruments; (140.3510) Lasers, fiber; (140.3490) Lasers, distributed-feedback; (140.4050) Mode-locked lasers; (300.6210) Spectroscopy, atomic; (300.6360) Spectroscopy, laser.