Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.66: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
A low-noise optical dipole trap as a source for matter wave interferometry — •Jonas Matthias, Jonas Hartwig, Dennis Schlippert, Ulrich Velte, Henning Albers, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik and Centre for Quantum Engineering and Space-Time Research - QUEST, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
We present our intensity stabilization design for an optical dipole trap (ODT) at a wavelength of 2 µ m using a Pockels cell and a digital feedback loop. Since the response of a Pockels cell and an analyzer is non-linear we implement a linear feedback and a linearization of the response function in a field programmable gate array (FPGA). This enables high feedback loop performance independent of the nonlinear response.
The low-noise ODT allows for control of the initial position of the cold atomic cloud with high repeatability as a source for matter wave interferometry. Applications include loading the ODT from a single species magneto-optical (MOT) trap as well as from a 87Rb/39K dual-species MOT.