SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.11: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Absolute light-shift compensated laser system for a twin-lattice atom interferometry — •Mikhail Cheredinov1, Matthias Gersemann1, Ekim T. Hanimeli2, Simon Kanthak3, Sven Abend1, Ernst M. Rasel1, and the QUANTUS team1,2,3,4,5,6 — 1Institut für Quantenoptik, LU Hannover — 2ZARM, Uni Bremen — 3Institut für Physik, HU zu Berlin — 4Institut für Quantenphysik, Uni Ulm — 5Institut für Angewandte Physik, TU Darmstadt — 6Institut für Physik, JGU Mainz
Twin-lattice atom interferometry is a method for forming symmetric interferometers with matter waves of large relative momentum by using two optical lattices propagating in opposite directions. A limiting factor is the loss of contrast associated with the AC Stark shift of far detuned light fields. This contribution presents the realization of a high power laser system for absolute light shift compensation and its potential for enhancing the interferometric contrast. The optical setup relies on two independent frequency doubling stages. One cavity produces the needed light fields for twin-lattice interferometry and another one produces one light field for AC Stark compensation.
Key features are the beam overlap on an interference filter with low power loss and coupling of high optical power in a photonic crystal fiber and further collimation of the output profile with flat-top beamshaper. The final beam contains the three linearly polarized light fields. Thanks to the flat-top shaped beam with more uniform intensity distribution it can be passed through our apertures with significantly less diffraction effects.