Versatile, high-power 460 nm laser system for Rydberg excitation of ultracold potassium

• Verfasst von: Arias Suárez, Alda Lisseth [VerfasserIn]
• Verfasst von: Helmrich, Stephan [VerfasserIn]
• Verfasst von: Lochead, Graham [VerfasserIn]
• Verfasst von: Whitlock, Shannon [VerfasserIn]
• Titel: Versatile, high-power 460 nm laser system for Rydberg excitation of ultracold potassium
• Verf.angabe: Alda Arias, Stephan Helmrich, Christoph Schweiger, Lynton Ardizzone, Graham Lochead, and Shannon Whitlock
• Umfang: 11 S.
• Fussnoten: Gesehen am 22.08.2017
• Titel Quelle: Enthalten in: Optics express
• Jahr Quelle: 2017
• Band/Heft Quelle: 25(2017), 13, S. 14829-14839
• ISSN Quelle: 1094-4087
• DOI: doi:10.1364/OE.25.014829
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1562644785
• K10plus-PPN:
  Universitätsbibliothek
• Lokale URL UB: Zum Volltext

Abstract

We present a versatile laser system which provides more than 1.5 W of narrowband light, tunable in the range from 455-463 nm. It consists of a commercial titanium-sapphire laser which is frequency doubled using resonant cavity second harmonic generation and stabilized to an external reference cavity. We demonstrate a wide wavelength tuning range combined with a narrow linewidth and low intensity noise. This laser system is ideally suited for atomic physics experiments such as two-photon excitation of Rydberg states of potassium atoms with principal quantum numbers n > 18. To demonstrate this we perform two-photon spectroscopy on ultracold potassium gases in which we observe an electromagnetically induced transparency resonance corresponding to the 35s1/2 state and verify the long-term stability of the laser system. Additionally, by performing spectroscopy in a magneto-optical trap we observe strong loss features corresponding to the excitation of s, p, d and higher-l states accessible due to a small electric field.