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arXiv · 1304.7243

Highly collimated source of cold Rubidium atoms from a two dimensional magneto-optical trap

Vincent Carrat·Citlali Cabrera-Guitierez·Marion Jacquey·José W. Tabosa·Bruno Viaris de Lesegno·Laurence Pruvost
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Abstract

Using a blue detuned laser shaped in a Laguerre-Gaussian donut mode we highly collimate the output of a two dimensional magneto-optical trap. The resulting atomic beam has a 1 mm diameter, its divergence is reduced from 40 down to 3 mrad and the atomic density is increased by a factor of 200. The collimation effect has been studied versus the order of the Laguerre-Gaussian mode (up to 10) and the laser atom frequency detuning (2 to 120 GHz). The 2D-colli-MOT study allows us to determine the best conditions which minimize the atom heating due to residual light absorption and optimize the collimation effect. The 2D-colli MOT could provide a new tool to fill a 3D-MOT using lasers with millimeter range diameters and thus sparing the laser power.

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Vincent Carrat, Citlali Cabrera-Guitierez, Marion Jacquey, José W. Tabosa, Bruno Viaris de Lesegno, Laurence Pruvost. 2013-04-26. Highly collimated source of cold Rubidium atoms from a two dimensional magneto-optical trap. https://arxiv.org/abs/1304.7243

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