Abstract
We demonstrate three-dimensional quenched narrow-line laser cooling and trapping of With 5 ms of cooling time we can transfer 28% of the atoms from a magneto-optic trap based on the strong 423-nm cooling line to a trap based on the narrow 657-nm clock transition (which is quenched by an intercombination line at 552 nm), thereby reducing the atoms’ temperature from 2 mK to 10 μK. This reduction in temperature should help to reduce the overall systematic frequency uncertainty for our Ca optical frequency standard to <1 Hz. Additional pulsed, quenched, narrow-line third-stage cooling in one dimension yields subrecoil temperatures as low as 300 nK and makes possible the observation of high-contrast two-pulse Ramsey spectroscopic line shapes.
© 2003 Optical Society of America
Full Article | PDF ArticleMore Like This
Uwe Sterr, Tomas Binnewies, Carsten Degenhardt, Guido Wilpers, Jürgen Helmcke, and Fritz Riehle
J. Opt. Soc. Am. B 20(5) 985-993 (2003)
Xinye Xu, Thomas H. Loftus, John L. Hall, Alan Gallagher, and Jun Ye
J. Opt. Soc. Am. B 20(5) 968-976 (2003)
Reinaldo L. Cavasso Filho, Wictor C. Magno, Daniela A. Manoel, Artemio Scalabrin, Daniel Pereira, and Flavio C. Cruz
J. Opt. Soc. Am. B 20(5) 994-1002 (2003)