Development of Atomic Frequency Standards Using Laser-Cooled Atoms (invited)

F. Strumia

N. Beverini, F. Strumia

Wolfgang A. Ertmer, R. Blatt, J. L. Hall

V. Rieger, D. Bettermann, F. Ruschewitz +4 more

Paul D. Kunz, Thomas P. Heavner, Steven R. Jefferts

We are developing a simple and robust laser and optics system suitable for a transportable laser-cooled rubidium (Rb) atomic fountain frequency standard. This system uses DFB (Distributed Feedback) diode lasers and a frequency offset-locking scheme to generate the optical frequencies needed for laser-cooling, launching, post-cooling, and detection of Rb atoms. Here, we describe the early results from this project and the anticipated performance of a compact, transportable Rb fountain frequency standard using this laser system. This system will also be useful for nontransportable laser-cooled atomic frequency standards.

Wolfgang A. Ertmer, Siegfried Penselin

During the recent past much effort has been spent on cooling of neutral atomic beams. As a result, two successful experimental methods for laser cooling of atomic beams were developed with post-cooling temperatures in the mK regime. We discuss in which ways these cooled atomic beams and new methods for further cooling and handling of these slow atomic beams could improve present and future frequency standards.