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All-solid-state continuous-wave laser systems for ionization, cooling and quantum state manipulation of beryllium ions

Lo, Hsiang-Yu ; Alonso, Joseba ; Kienzler, Daniel ; Keitch, Benjamin ; de Clercq, Ludwig ; Negnevitsky, Vlad ; Home, Jonathan

In: Applied Physics B, 2014, vol. 114, no. 1-2, p. 17-25

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    Title
    • All-solid-state continuous-wave laser systems for ionization, cooling and quantum state manipulation of beryllium ions
    Author
    • Lo, Hsiang-Yu. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    • Alonso, Joseba. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    • Kienzler, Daniel. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    • Keitch, Benjamin. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    • de Clercq, Ludwig. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    • Negnevitsky, Vlad. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    • Home, Jonathan. Institute for Quantum Electronics, ETH Zürich, Schafmattstrasse 16, 8093, Zürich, Switzerland
    Document Type
    • Postprint
    Classification
    • Physics
    OAI-PMH Identifier
    • oai:doc.rero.ch:325724
    Summary
    We describe laser systems for photoionization, Doppler cooling, and quantum state manipulation of beryllium ions. For photoionization of neutral beryllium, we have developed a continuous-wave 235nm source obtained by two stages of frequency doubling from a diode laser at 940nm. The system delivers up to 400 mW at 470nm and 28 mW at 235nm. For control of the beryllium ion, three laser wavelengths at 313nm are produced by sum-frequency generation and second-harmonic generation from four infrared fiber lasers. Up to 7.2 W at 626nm and 1.9 W at 313nm are obtained using two pump beams at 1051 and 1551nm. Intensity drifts of around 0.5% per hour have been measured over 8h at a 313nm power of 1W. These systems have been used to load beryllium ions into a segmented ion trap.