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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 11, Iss. 5 — May. 1, 1994
  • pp: 703–711

Measurements of temperature and spring constant in a magneto-optical trap

C. D. Wallace, T. P. Dinneen, K. Y. N. Tan, A. Kumarakrishnan, P. L. Gould, and J. Javanainen  »View Author Affiliations


JOSA B, Vol. 11, Issue 5, pp. 703-711 (1994)
http://dx.doi.org/10.1364/JOSAB.11.000703


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Abstract

We have measured the low-density characteristics of a magneto-optical trap for both isotopes of rubidium. Trapped-atom temperatures are measured by the time-of-flight technique and are similar to temperatures in optical molasses. They are below the Doppler limit in most cases and increase linearly with the ratio of laser intensity to laser detuning. A slight difference between the two isotopes is observed. The data agree well with three-dimensional, multistate, semiclassical simulations. Spring constants of the trap are inferred from careful measurements of the size of the trapped-atom cloud. The spring constant is seen to increase with intensity at low intensity, becoming independent of intensity at high intensity. This trend is consistent with sub-Doppler cooling mechanisms.

© 1994 Optical Society of America

Citation
C. D. Wallace, T. P. Dinneen, K. Y. N. Tan, A. Kumarakrishnan, P. L. Gould, and J. Javanainen, "Measurements of temperature and spring constant in a magneto-optical trap," J. Opt. Soc. Am. B 11, 703-711 (1994)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-11-5-703

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