Integrated Atomic Quantum Technologies in Demanding Environments: Development and Qualification of Miniaturized Optical Setups and Integration Technologies for UHV and Space Operation

M. Christa,b, A. Kassnerc, R. Smolb, A. Bawamiab, A. Petersa,b, M. Wurzc, E. Raseld, A. Wichtb and M. Krutzika,b

Published in:

Proc.SPIE 11180, International Conference on Space Optics (ICSO 2018), Chania, Greece, Oct.9-12, 1118088 (2019).

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Abstract:

Employing compact quantum sensors in field or in space (e.g., small satellites) implies demanding requirements on components and integration technologies. Within our work on integrated sensors, we develop miniaturized, ultra-stable optical setups for optical cooling and trapping of cold atomic gases. Besides challenging demands on alignment precision, and thermo-mechanical durability, we specifically address ultra-high vacuum (UHV) compatibility of our integration technologies and optical components. A prototype design of an UHV-compatible, crossed beam optical dipole trap setup and its application within a cold atomic quantum sensor is described.
First qualification efforts on adhesive micro-integration technologies are presented. These tests are conducted in application-relevant geometries and material combinations common for micro-integrated optical setups. Adhesive aging will be investigated by thermal cycling or gamma radiation exposure. For vacuum compatibility testing, a versatile UHV testing system is currently being set up, enabling residual gas analysis and measurement of total gas rates down to 5⋅10-10mbar l/s at a base pressure of 10-11mbar, exceeding the common ASTM E595 test.

a Humboldt-Universität zu Berlin, Optical Metrology Group - Quantum Sensors and Space Technology, Newtonstr. 15, 12489 Berlin, Germany
b Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
c Leibniz University Hanover, Institute of Micro Production Technology, An der Universität 2, 30823 Garbsen, Germany
d Leibniz University Hanover, Institute of Quantum Optics, Welfengarten 1, 30167 Hannover, Germany

Keywords:

Micro-integration, Adhesive, Outgassing, Residual gas analysis, Quantum sensors, Environmental testing, Qualification, Ultra-high vacuum, Miniaturized optical setups, Cold atoms.