Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.32: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
A robust laser system for atom interferometry with rubidium on very long baselines — •Dorothee Tell, Christian Meiners, Etienne Wodey, Dennis Schlippert, Christian Schubert, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover, Germany
The Very Long Baseline Atom Interferometer (VLBAI) introduces a new scale of ground-based interferometers employing ultra-cold atoms on a 10 m baseline, enabling absolute measurements of gravity and its gradients with unprecedented precision and macroscopic separations of superposition states. Long distances and interferometry times pose a challenge to all the components to avoid technical limitations, questioning the scalability of known methods and constraints.
Demands on the laser system for rubidium atom interferometry comprise well-chosen seed laser frequencies, the flexibility to implement a cooling scheme ensuring low expansion rates of the atomic ensembles, and high power in large interferometry beams to reduce wavefront induced phase shifts and enable large momentum transfer beam splitters.
We will present a robust laser system relying on well established telecommunication technology at 1560 nm allowing low-noise lasers and high-power amplifiers, and using flexible single-pass second harmonic generation to create light around the rubidium D2 transition frequency.
The VLBAI facility is a major research equipment funded by the DFG. We acknowledge support from the CRCs 1128 “geo-Q” and 1227 “DQ-mat”.