In this paper, we present a technique for magneto-optical cooling and trapping of neutral atoms using a single laser. The alternating-frequency magneto-optical trap (AF-MOT) uses an agile light source that sequentially switches between cooling and repumping transition frequencies by tuning the injection current of the laser diode. We report on the experimental demonstration of such a system for 87Rb and 85Rb based on a microintegrated extended cavity diode laser performing laser frequency jumps of up to 6.6 GHz with a tuning time in the microsecond regime and a repetition rate of up to 7.6 kHz. For that, a combination of a feed-forward for coarse frequency control and a feedback for precise locking was used. We discuss the results of the AF-MOT characterization in terms of atom numbers and cloud temperature for different operation parameters.
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October 2019
Research Article|
October 11 2019
A single-laser alternating-frequency magneto-optical trap
B. Wiegand
;
B. Wiegand
a)
1
Institut für Physik, Humboldt-Universität zu Berlin
, 12489 Berlin, Germany
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B. Leykauf
;
B. Leykauf
1
Institut für Physik, Humboldt-Universität zu Berlin
, 12489 Berlin, Germany
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K. Döringshoff
;
K. Döringshoff
1
Institut für Physik, Humboldt-Universität zu Berlin
, 12489 Berlin, Germany
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Y. D. Gupta
;
Y. D. Gupta
1
Institut für Physik, Humboldt-Universität zu Berlin
, 12489 Berlin, Germany
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A. Peters;
A. Peters
1
Institut für Physik, Humboldt-Universität zu Berlin
, 12489 Berlin, Germany
2
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
, 12489 Berlin, Germany
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M. Krutzik
M. Krutzik
1
Institut für Physik, Humboldt-Universität zu Berlin
, 12489 Berlin, Germany
2
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
, 12489 Berlin, Germany
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a)
Electronic mail: benjamin.wiegand@physik.hu-berlin.de
Rev. Sci. Instrum. 90, 103202 (2019)
Article history
Received:
May 20 2019
Accepted:
September 04 2019
Citation
B. Wiegand, B. Leykauf, K. Döringshoff, Y. D. Gupta, A. Peters, M. Krutzik; A single-laser alternating-frequency magneto-optical trap. Rev. Sci. Instrum. 1 October 2019; 90 (10): 103202. https://doi.org/10.1063/1.5110722
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