Near-Recoil-Limited Temperatures Obtained by Laser Trapping on the Narrow 1So - 3P1 Intercombination Transition of Neutral Strontium

Published

April 1, 1999

Author(s)

K R. Vogel, Tim P. Dinneen, Alan Gallagher, J L. Hall

Abstract

About 2 x 10⁷ neutral strontium atoms have been loaded into a magneto-optical trap (MOT) that uses the narrow (7 kHz) intercombinationline at 689 nm as the cycling transition. The atoms are second-stage laser cooled to - 10 {difference} 10 K from an initial 5 mK atomic sample ({difference} 5 x 10⁷ atoms), generated in a vapor cell MOT that employs the strong (32 MHz) cycling transition at 461 nm. To demonstrate the low temperatures of these atoms, optical Ramsey spectroscopy is performed upon the ¹S_o -³P₁ transition using only two excitation pulses; the velocity dependence of the fringe contrast indicates an rms velocity of 3cm/s for the 689 nm MOT-cooled sample.

Proceedings Title

International Frequency Control Symposium | 53th | Proceedings of the 1999 IEEE/EIA International Frequency Control Symposium and Exhibition | IEEE

Conference Dates

April 1, 1999

Conference Location

Besancon, FR

Conference Title

IEEE International Frequency Control Symposium

Pub Type

Conferences

Keywords

frequency metrology, laser cooling, laser trapping, strontium

Citation

Vogel, K. , Dinneen, T. , Gallagher, A. and Hall, J. (1999), Near-Recoil-Limited Temperatures Obtained by Laser Trapping on the Narrow ¹S_o - ³P₁ Intercombination Transition of Neutral Strontium, International Frequency Control Symposium | 53th | Proceedings of the 1999 IEEE/EIA International Frequency Control Symposium and Exhibition | IEEE, Besancon, FR (Accessed October 18, 2025)