Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 63: Poster – Quantum Information (joint session QI/Q)

Q 63.54: Poster

Thursday, March 13, 2025, 17:00–19:00, Tent

Robust VECSEL for Controlling trapped Magnesium Ions — •Tobias Spanke, Lennart Guth, Philip Kiefer, Lucas Eisenhart, Deviprasath Palani, Apurba Das, Florian Haße, Jörn Denter, Mario Niebuhr, Ulrich Warring, and Tobias Schätz — Physikalisches Institut, Albert-Ludwigs-Universität, Freiburg

Trapped ions present a promising platform for quantum simulations and quantum sensing. Versatile and robust laser systems with narrow bandwidth and high power and intensity stability are required at UV range of 280 nm to reliably load and control this platform. The latest systems for Mg⁺, Be⁺ ions are based on vertical external cavity surface-emitting lasers (VECSEL) [1] in the near-infrared. A new generation of air-cooled systems is proposed to decrease bandwidth and increase stability while mitigating expensive temperature control systems. With the goal of measuring magnesium ions at a frequency stability of 200 kHz ( λ ≈ 1120  nm, P=2 W with λ≈ 280 nm at the experiment) with high accuracy. We aim at further development of the VECSEL into a compact, stable, and user-friendly "turnkey" system.
[1] Burd, S. et al.(2016), VECSEL systems for generation and manipulation of trapped magnesium ions, Optica Vol. 3, Issue 12, pp. 1294-1299 (2016)

Keywords: VECSEL; Mg 25