Optimized loading of an optical dipole trap for the production of Chromium BECs

We report on a strategy to maximize the number of chromium atoms transferred from a magneto-optical trap into an optical trap through accumulation in metastable states via strong optical pumping. We analyse how the number of atoms in a chromium Bose Einstein condensate can be raised by a proper hand...

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Bibliographic Details
Published inarXiv.org
Main Authors Bismut, G, Pasquiou, B, Ciampini, D, Laburthe-Tolra, B, Marechal, E, Vernac, L, Gorceix, O
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.04.2010
Subjects
Atomic properties
Chromium
Diodes
Dipoles
Metastable state
Optical pumping
Physics - Atomic Physics
Physics - Quantum Gases
Semiconductor lasers
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Summary:We report on a strategy to maximize the number of chromium atoms transferred from a magneto-optical trap into an optical trap through accumulation in metastable states via strong optical pumping. We analyse how the number of atoms in a chromium Bose Einstein condensate can be raised by a proper handling of the metastable state populations. Four laser diodes have been implemented to address the four levels that are populated during the MOT phase. The individual importance of each state is specified. To stabilize two of our laser diode, we have developed a simple ultrastable passive reference cavity whose long term stability is better than 1 MHz.
ISSN:2331-8422
DOI:10.48550/arxiv.1004.3642