Towards a Strontium Beam Optical Reference Based on the 1S0 → 3P1 Intercombination Line on a Sounding Rocket
Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC), Orlando, USA, Apr. 14-18 (2019).
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Within the OPUS collaboration, we develop optical frequency references based on spectroscopy of the 1S0 → 3P1 intercombination line of 88Sr at 689 nm in thermal and laser-cooled strontium beams for operation on sounding rockets. One main objective is to identify suitable experimental setups and core components for a compact and robust strontium beam clock, providing a stepping stone for future spaceborne devices. Recent results demonstrate successful laser stabilization to the intercombination line in a thermal beam breadboard setup.
1 Humboldt-Universität zu Berlin, Germany
2 Menlo Systems GmbH, Martinsried, Germany
3 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Berlin, Germany
Strontium; Beam Standard; 689nm; Atomic Beams; Optical Frequency References; Ramsey-Bordé; Electron-Shelving Detection.