4 research outputs found

    Isotopic difference in the heteronuclear loss rate in a two-species surface trap

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    We have realized a two-species mirror-magneto-optical trap containing a mixture of 87^{87}Rb (85^{85}Rb) and 133^{133}Cs atoms. Using this trap, we have measured the heteronuclear collisional loss rate βRb−Cs′\beta_{Rb-Cs}' due to intra-species cold collisions. We find a distinct difference in the magnitude and intensity dependence of βRb−Cs′\beta_{Rb-Cs}' for the two isotopes 87^{87}Rb and 85^{85}Rb which we attribute to the different ground-state hyperfine splitting energies of the two isotopes.Comment: 4 pages, 2 figure

    Aufbau eines Experimentes zur Erzeugung ultrakalter, dichter Gase unter Verwendung eines neuartigen Lasersystems

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    Die vorliegende Arbeit beschreibt die Entwicklung einer Apparatur zur Erzeugung eines ultrakalten und dichten Ensembles von Rubidium-Atomen mit dem Ziel der Quanteninformationsverarbeitung mit Rydberg-Zustanden. Es wurde eine Magneto-Optische Falle aufgebaut, bei der die Spulen zur Erzeugung des magnetischen Quadrupolfeldes im Inneren der Vakuumkammer angebracht sind. Das Fallenlicht wird von einem neuartigen "Doppel-Injektionssystem" geliefert, bei dem die Strahlen zweier injektionsstabilisierter Laserdioden koharent derart addiert werden, dass sie nicht von einem Laserstrahl aus einer einzigen Quelle unterscheidbar sind. Konzepte zur Erhohung der Dichte durch eine blauverstimmte Dipolfalle und zur Erniedrigung der Temperatur durch entartetes 3DRaman- Seitenband-Kuhlen werden erarbeitet

    Phase-coherent addition of laser beams with identical spectral properties

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    We coherently add two beams from separate diode lasers with identical frequencies to obtain a single coherent beam (degree of coherence equal/similar 1) with well-defined polarization. The frequencies of the two sources are simultaneously injection locked to a third laser oscillator. The laser beams are merged at a polarizing beam splitter cube with an active stabilization of the relative phase against acoustic noise and thermal drifts. Different schemes to control the relative phase are investigated. The system can easily be extended to coherently add a large number of laser sources

    Phase-coherent addition of laser beams with identical spectral properties

    No full text
    We coherently add two beams from separate diode lasers with identical frequencies to obtain a single coherent beam (degree of coherence equal/similar 1) with well-defined polarization. The frequencies of the two sources are simultaneously injection locked to a third laser oscillator. The laser beams are merged at a polarizing beam splitter cube with an active stabilization of the relative phase against acoustic noise and thermal drifts. Different schemes to control the relative phase are investigated. The system can easily be extended to coherently add a large number of laser sources
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