Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial dynamics of laser-induced fluorescence in an intense laser beam:
  experiment and theory in alkali metal atoms   We have shown that it is possible to model accurately optical phenomena in
intense laser fields by taking into account the intensity distribution over the
laser beam. We developed a theoretical model that divided an intense laser beam
into concentric regions, each with a Rabi frequency that corresponds to the
intensity in that region, and solved a set of coupled optical Bloch equations
for the density matrix in each region. Experimentally obtained magneto-optical
resonance curves for the $F_g=2\longrightarrow F_e=1$ transition of the $D_1$
line of $^{87}$Rb agreed very well with the theoretical model up to a laser
intensity of around 200 mW/cm$^2$ for a transition whose saturation intensity
is around 4.5 mW/cm$^2$. We have studied the spatial dependence of the
fluorescence intensity in an intense laser beam experimentally and
theoretically. An experiment was conducted whereby a broad, intense pump laser
excited the $F_g=4\longrightarrow F_e=3$ transition of the $D_2$ line of cesium
while a weak, narrow probe beam scanned the atoms within the pump beam and
excited the $D_1$ line of cesium, whose fluorescence was recorded as a function
of probe beam position. Experimentally obtained spatial profiles of the
fluorescence intensity agreed qualitatively with the predictions of the model.

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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: eess
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc