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20 November 2017 The space optical clocks project
S. Schiller, G. M. Tino, P. Lemonde, U. Sterr, Ch. Lisdat, A. Görlitz, N. Poli, A. Nevsky, C. Salomon
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Proceedings Volume 10565, International Conference on Space Optics — ICSO 2010; 1056531 (2017) https://doi.org/10.1117/12.2309166
Event: International Conference on Space Optics—ICSO 2010, 2010, Rhodes Island, Greece
Abstract
The Space Optical Clocks project aims at operating lattice clocks on the ISS for tests of fundamental physics and for providing high-accuracy comparisons of future terrestrial optical clocks. A pre-phase-A study (2007- 10), funded partially by ESA and DLR, included the implementation of several optical lattice clock systems using Strontium and Ytterbium as atomic species and their characterization. Subcomponents of clock demonstrators with the added specification of transportability and using techniques suitable for later space use, such as all-solid-state lasers, low power consumption, and compact dimensions, have been developed and have been validated. This included demonstration of laser-cooling and magneto-optical trapping of Sr atoms in a compact breadboard apparatus and demonstration of a transportable clock laser with 1 Hz linewidth. With two laboratory Sr lattice clock systems a number of fundamental results were obtained, such as observing atomic resonances with linewidths as low as 3 Hz, non-destructive detection of atom excitation, determination of decoherence effects and reaching a frequency instability of 1×10-16.
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S. Schiller, G. M. Tino, P. Lemonde, U. Sterr, Ch. Lisdat, A. Görlitz, N. Poli, A. Nevsky, and C. Salomon "The space optical clocks project", Proc. SPIE 10565, International Conference on Space Optics — ICSO 2010, 1056531 (20 November 2017); https://doi.org/10.1117/12.2309166
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KEYWORDS
Clocks
Strontium
Chemical species
Optical clocks
Astronomical imaging
Ytterbium
Laser development
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