SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 7: Precision Measurements
Q 7.12: Poster
Dienstag, 21. September 2021, 16:30–18:30, P
A laser system for combining Bragg and Raman processes — •Ekim T. Hanimeli1, Martina Gebbe1, Matthias Gersemann2, Simon Kanthak3,4, Sven Abend2, Sven Herrmann1, Claus Lämmerzahl1, and QUANTUS team1,2,3,4 — 1ZARM, Universität Bremen — 2Institut für Quantenoptik, LU Hannover — 3Institut für Physik, HU Berlin — 4Ferdinand-Braun-Institut, Berlin
Bragg and Raman diffractions are commonly used in atom interferometry to form beam splitters and mirrors. The two processes differ in their internal state transitions, so their combination enables the creation of novel interferometry topologies through the inclusion of both internal and external states. Here, we present the new fibre-optical laser system capable of implementing both Bragg and Raman processes as well as double diffractions, allowing a wide variety of possibilities to be achieved. Especially for Raman diffraction a low-phase noise implementation for the hyperfine splitting is mandatory. In our system this is realized with a combination of an electro-optical modulator and a fibre Bragg grating, which suppresses the unwanted optical sidebands in the modulation.
This work is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under Grant No. 50WM1952 (QUANTUS-V-Fallturm).