Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 55: Matter Wave Optics
Q 55.3: Talk
Friday, March 13, 2020, 11:30–11:45, a310
Novel techniques for simplified cold atomic gravimeters — •Julia Pahl1, Benjamin Wiegand1, Bastian Leykauf1, Klaus Döringshoff1, Y Durvasa Gupta1, Merle Cornelius3, Peter Stromberger5, Achim Peters1,2, Markus Krutzik1,2, and THE QUANTUS Team1,3,4,5,6,7 — 1HU Berlin — 2FBH Berlin — 3U Bremen — 4LU Hannover — 5JGU Mainz — 6U Ulm — 7TU Darmstadt
Cold atom experiments performed in practical instruments outside the lab need to satisfy strict demands on the SWaP budget (size, weight and power). In this talk, we present a technique for magneto-optical cooling and trapping of neutral Rb atoms with just a single laser [1]. Here, an agile light source, based on a micro-integrated extended
cavity diode laser, is used to sequentially switch between cooling and repumping transition frequencies. We present the characterization of this alternating-frequency MOT (AF-MOT) and further discuss a simple method to determine the local gravitational acceleration by repetitive levitation of a Rb BEC with a single-frequency laser beam. Together, these techniques may be used to reduce the complexity of the laser system architecture required for cold atomic gravity sensors.
This project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Energy under grant number DLR 50WM1552-1557 and 50WP1432.
[1] Wiegand et al., A single-laser alternating-frequency magneto-optical trap, Rev. Sci. Instrum. 90, 1032202 (2019)