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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.23: Poster
Wednesday, March 8, 2017, 17:00–19:00, P OG2
Compact and stable potassium laser system for dual-species atom interferometry in microgravity — •Julia Pahl1, Christoph Grzeschik1, Aline Dinkelaker1,2, Max Schiemangk1,2, Markus Krutzik1, Achim Peters1, and The QUANTUS-Team1,3,4,5 — 1HU Berlin — 2FBH Berlin — 3U Bremen — 4LU Hannover — 5JGU Mainz
We present a laser system for laser cooling and atom interferometry with 41K atoms for future dual-species experiments in microgravity testing the Einstein equivalence principle with ultracold quantum matter. This potassium laser system will be integrated into the QUANTUS-2 drop capsule already performing atom-chip based rubidium BEC experiments at the drop tower in Bremen. Demanding limitations on mass and size due to the capsule’s technical restrictions as well as strong accelerations during the catapult launch require the laser system to be compact and robust. High-power, micro-integrated distributed-feedback diode laser modules in combination with novel compact electronics allow to meet these strict requirements while keeping the output power and spectral characteristics compliant with 41K BEC generation. In this poster, we present the details of our laser system, focussing on overcoming technical demands and discuss the challenges of 41K featuring a hyperfine splitting comparable to the natural linewidth.
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.