4 research outputs found
Isotopic difference in the heteronuclear loss rate in a two-species surface trap
We have realized a two-species mirror-magneto-optical trap containing a
mixture of Rb (Rb) and Cs atoms. Using this trap, we have
measured the heteronuclear collisional loss rate due to
intra-species cold collisions. We find a distinct difference in the magnitude
and intensity dependence of for the two isotopes Rb and
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
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
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
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