We report on a simple method for an active position stabilization of an atomic cloud trapped in a magneto-optical trap operating on the narrow 182 kHz intercombination line of atomic ytterbium. Our method makes use of the significant sensitivity of the position of a narrow-line magneto-optical trap (MOT) on the laser frequency. After in situ detection of the MOT position using a Pi Camera, an error signal is generated by a Raspberry Pi, which is directly fed back onto the laser frequency. Thus, perturbations of the MOT position, e.g., due to drifts of the Zerodur cavity to which the MOT laser is stabilized or the ambient magnetic field, can be compensated directly. Our method allows for long-term stabilization of the MOT position on a 10 µm scale and thus improves loading of a tightly focused optical trap.
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March 2021
Research Article|
March 18 2021
Active position stabilization of an atomic cloud in a narrow-line magneto-optical trap using a Raspberry Pi
C. Sillus
;
C. Sillus
a)
Institut für Experimentalphysik, Heinrich-Heine Universität, Universitätsstraße 1
, 40225 Düsseldorf, North Rhine-Westphalia, Germany
a)Author to whom correspondence should be addressed: christian.sillus@hhu.de
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T. Franzen
;
T. Franzen
Institut für Experimentalphysik, Heinrich-Heine Universität, Universitätsstraße 1
, 40225 Düsseldorf, North Rhine-Westphalia, Germany
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B. Pollklesener;
B. Pollklesener
Institut für Experimentalphysik, Heinrich-Heine Universität, Universitätsstraße 1
, 40225 Düsseldorf, North Rhine-Westphalia, Germany
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A. Görlitz
A. Görlitz
Institut für Experimentalphysik, Heinrich-Heine Universität, Universitätsstraße 1
, 40225 Düsseldorf, North Rhine-Westphalia, Germany
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a)Author to whom correspondence should be addressed: christian.sillus@hhu.de
Rev. Sci. Instrum. 92, 033204 (2021)
Article history
Received:
December 11 2020
Accepted:
March 06 2021
Citation
C. Sillus, T. Franzen, B. Pollklesener, A. Görlitz; Active position stabilization of an atomic cloud in a narrow-line magneto-optical trap using a Raspberry Pi. Rev. Sci. Instrum. 1 March 2021; 92 (3): 033204. https://doi.org/10.1063/5.0040257
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