A versatile, high-power 460nm laser system for Rydberg excitation of ultracold potassium
arXiv:1702.02957 · doi:10.1364/OE.25.014829
Abstract
We present a versatile laser system which provides more than 1.5W 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.
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- Rydberg blockade in an ultracold strontium gas revealed by two-photon excitation dynamics
- Inverted Ladder Type Optical Excitation of Potassium Rydberg States with Hot and Cold Ensembles
- Universal Barenco quantum gates via a tunable non-collinear interaction
- Strong zero-field Förster resonances in K-Rb Rydberg systems