Optical pumping in rubidium-87 - Impure polarization (a mixture of sigma+, sigma- and pi light) on the (Fg=2 - Fe=3) transition in the D2 line

Anders Kastberg, Fred Atoneche

Published Jan 1, 2017• 0 citations

Abstract

We present results of a method for calculating optical pumping rates in Rb-87, as described in Eur. J. Phys 38, 045703 (2017) We use light with an impure polarization (i.e. a mixture of sigma+, sigma- and pi light) to populate a stretched angular momentum state in the Fg=2 hyperfine structure level of the ground state. The method is shown to function well for the studied system. Absolute scale level populations as functions of time, detuning, intensity, relative intensity of polarizations, and starting parameters are derived.

DOI: 10.6084/m9.figshare.3859260.v3

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Optical pumping in rubidium-87 - Impure polarization (a mixture of sigma+, sigma- and pi light) on the (Fg=2 - Fe=3) transition in the D2 line

Anders Kastberg, Fred Atoneche

Published Jan 1, 2017• 0 citations

Publisher

Abstract

DOI: 10.6084/m9.figshare.3859260.v3

Related papers

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We investigate the population differences between ground-state hyperfine levels (

{5S}_{1/2},F=2

and

{5S}_{1/2},

F=1

) of an optically pumped

{}^{87}\mathrm{Rb}

beam in a static magnetic field, taking into account the various kinds of atomic coherence (Zeeman, hyperfine, and optical). The pumping lasers are monochromatic and in resonance with the ${(5S}_{1/2},F=1\ensuremath{\leftrightarrow}{5P}_{1/2}{,F}^{\ensuremath{'}}=1)$ transition. By varying the polarization configuration of the pumping lasers, we find that the pumping efficiency is substantially enhanced when a $\ensuremath{\sigma}$-polarized laser and a $\ensuremath{\pi}$-polarized laser are counterpropagating. In this case, the pumping efficiency remains high even in a weak magnetic field, which explains qualitatively experimental data reported previously from a cesium beam experiment.