Diode-laser deceleration and collimation of a rubidium beam

Sheehy, B.; Shang, S.-Q.; Watts, R. N.; Hatamian, S.; Metcalf, Harold

doi:10.1364/josab.6.002165

Cited by 53 publications

(16 citation statements)

References 26 publications

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“…In particular, in the 2D cooling of two-level atoms by a strong laser field, it has been demonstrated both experimentally [16] and by using numerical methods [17,18] that atoms tend to gather into groups having well-defined velocities under cooling as well as heating conditions. The same feature has been observed [5] in the case of atomic heating in a geometry when the multilevel structure of the atomic ground state is important [8]. The numerical calculations also show [19] that, in multidimensional cases, the light-induced force and momentum diffusion coefficient can difFer considerably from that obtained in the 1D case.…”

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confidence: 70%

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Two-dimensional forces and atomic motion in a sub-Doppler limit

1992

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A theoretical analysis is given of the interaction of a laser field consisting of two orthogonal, linearly polarized, low-power standing waves, with an ensemble of J = 2 ground-state atoms. The atoms are assumed to move with velocities below the Doppler limit of laser cooling. The two-dimensional light-induced atomic force is calculated for the specific case when the field polarization directions difFer by x/2. The eifective optical-pumping time is shown to increase strongly near the nodes of the laser field, leading to a force that can be much larger than that in the one-dimensional case. The force is not isotropic, and can lead to the bunching of the atoms in velocity space.PACS number(s): 32.80. Pj, 42.50.Vk

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confidence: 70%

“…Although the experiments are mostly carried out for three- [1 -4] and two-dimensional (2D) [5] laser field configurations [6], detailed analytical calculations exist for one-dimensional (1D) cooling only (Refs. [7 -15]).…”

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confidence: 99%

Two-dimensional forces and atomic motion in a sub-Doppler limit

1992

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“…-Continuous beams of slow atoms are of interest for many applications in atomic spectroscopy, collision studies, atom optics, atom interferometry, and atomic frequency standards. Cold atomic beams have been produced from thermal beams using various techniques including slowing of thermal beams by frequency-chirped lasers [1], [2] or by Zeeman tuning [3]. Magneto-optical compression has been used in combination with velocity-selective atomic-beam deflection [4] or moving molasses loaded from a slowed thermal beam [5], [6] to increase atomic density.…”

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confidence: 99%

A continuous beam of slow, cold cesium atoms magnetically extracted from a 2D magneto-optical trap

et al. 1998

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PACS. 32.80Pj -Optical cooling of atoms; trapping. PACS. 42.50Vk -Mechanical effects of light on atoms, molecules, electrons, and ions.Abstract. -Starting from a 2D magneto-optical trap where cesium atoms are permanently subjected to 3D sub-Doppler cooling and 2D magneto-optical trapping, we have produced a beam of cold atoms continuously extracted along the trap axis. The simplest extraction mechanism, presently used, is the drift velocity induced by a constant magnetic field. We have used this continuous beam of atoms to produce Ramsey fringes in a microwave cavity as a first demonstration of an atomic resonator operating continuously with laser cooled atoms. The shape of the resonance pattern allows an estimate of the axial temperature, typically 200 mK. The average velocity can be adjusted from 0.7 to 3 m/s; the trap-to-atomic-beam conversion efficiency is close to one.

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“…E 10,19]. We discuss now the characteristics of single histories of the atomic state when a J g = 1 =2 t o J e = 3 =2 transition is driven by a standing wave with + circular polarization, in the presence of a transverse magnetic eld.…”

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confidence: 99%

“…The intermittent process of Zeeman mixing and optical pumping leads to a Sisyphus-type cooling when the detuning is negative 10,19]. The naive picture of this process is that the atom is optically pumped near the antinodes to j + > by jumps with = 0, where its light-shifted energy is minimal.…”

Section: +-;mentioning

confidence: 99%