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QI: Fachverband Quanteninformation
QI 23: Poster II (joint session QI/Q)
QI 23.34: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Rack-mounted Laser Systems for Quantum Computing with Be+ and Ca+ Ions — •Gunnar Langfahl-Klabes1, Niels Kurz2, Malte Stoepper1,2, Stephan Hannig1, and Piet Schmidt1,2 — 1Physikalisch-Technische Bundesanstalt, Braunschweig — 2Institute of Quantum Optics, Leibniz University Hannover
Co-locating quantum processing units based on ion traps with classical computers in data centers requires highly integrated, transportable, modularized, turn-key laser systems in an overall form factor that complies with 19-inch rack-mount standards.
The ion trap-based quantum computer of Quantum Valley Lower Saxony (QVLS-Q1) uses Be+ ions as qubits and Ca+ ions for sympathetic cooling. Within three half-height server racks we provide all of the necessary lasers for cooling, repumping, and detection. Our systems feature four monolithic rack drawers that contain customized setups for sum-frequency generation, second-harmonic generation, and frequency shifting. All rack-mounted laser outputs are fiber-coupled. Free-space components for ablation and photoionization are placed close to the vacuum chamber.
The wavelengths used in our setup range from deep-UV to near-IR (235, 313, 375, 397, 422, 470, 515, 626, 854, 866, 1051, 1552 nm). With red light at 626 nm we realize a laser stabilization setup via Doppler-free iodine spectroscopy for the Be+ cooling and detection laser system at 313 nm.
We report on the current status of our laser systems.