Production of high-intensity beams of ultracold atoms

Henry Fernandes Passagem, Luís Gustavo Marcassa

Eugeny Korsunsky, Dmitry V. Kosachiov, Yu. Rozhdestvensky

The characteristic feature of the transversal cooling with OPT is that light pressure force F z is of constant sign in a whole range of velocity variation [1,2]. Therefore, decelerating the atoms with v z < 0, the same force accelerates the atoms with positive velocities, that leads to the considerable loss of final intensity of the atomic beam.

利康 市岡

Klaus Hueck, Niclas Luick, Lennart Sobirey +5 more

Absorption imaging of ultracold atoms is the foundation for quantitative extraction of information from experiments with ultracold atoms. Due to the limited exposure time available in these systems, the signal-to-noise ratio is largest for high intensity absorption imaging where the intensity of the imaging light is on the order of the saturation intensity. In this case, the absolute value of the intensity of the imaging light enters as an additional parameter making it more sensitive to systematic errors. Here, we present a novel and robust technique to determine the imaging beam intensity in units of the effective saturation intensity to better than 5%. We do this by measuring the momentum transferred to the atoms by the imaging light while varying its intensity. We further utilize the method to quantify the purity of the polarization of the imaging light and to determine the correct imaging detuning.

Daniel González-Cuadra, Maciej Lewenstein, A. Bermúdez +3 more

V. I. Balykin