Improvements to a Transportable Atomic Fountain Laser System

P.D. Kunz, V. Gerginov, T.P. Heavner, and S.R. Jefferts

Abstract:	We are developing a transportable rubidium (Rb) atomic fountain frequency standard that uses independently phase-locked diode lasers for laser-cooling. At this time, we have not demonstrated sub-Doppler (microKelvin) atom temperatures using our phase-locked laser scheme. However, we present measurements indicating the problem is due to insufficient phase-coherence between the cooling lasers. We are presently building a new generation of laser-locking electronics, which we believe will allow for sub-Doppler laser cooling of the Rb atoms. Additionally, we discuss a number of improvements we have made to the system since our last publication.
Published in:	Proceedings of the 43rd Annual Precise Time and Time Interval Systems and Applications Meeting November 14 - 17, 2011 Hyatt Regency Long Beach Long Beach, California
Pages:	493 - 500
Cite this article:	Kunz, P.D., Gerginov, V., Heavner, T.P., Jefferts, S.R., "Improvements to a Transportable Atomic Fountain Laser System," Proceedings of the 43rd Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, November 2011, pp. 493-500.
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