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Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Towards compact optical quantum technology for space environments

Marc Christ, Achim Peters, Markus Krutzik, The Kactus Team

Published Jun 1, 2017• 1 citation
Publisher

Abstract

Reliable long-term operation of integrated quantum sensors employing atom interferometry in space imposes challenging requirements on the utilized technology and materials. In the last decade, the progress in miniaturization of each experimental subsystem (e.g., vacuum chamber with atom source, laser system and optics) greatly benefited from atom chip technology [1], micro integrated diode laser modules [2] and compact optical bench setups [3], developed in the context of the QUANTUS and LASUS collaborations.

DOI
10.1109/cleoe-eqec.2017.8086914

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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 10-11 mbar, exceeding the common ASTM E595 test.