Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conversion efficiency in the process of co-polarized spontaneous
  four-wave mixing   We study the process of co-polarized spontaneous four-wave mixing in
single-mode optical fibers, with an emphasis on an analysis of the conversion
efficiency. We consider both the monochromatic-pumps and pulsed-pumps regimes,
as well as both the degenerate-pumps and non-degenerate-pumps configurations.
We present analytical expressions for the conversion efficiency, which are
given in terms of double integrals. In the case of pulsed pumps we take these
expressions to closed analytical form with the help of certain approximations.
We present results of numerical simulations, and compare them to values
obtained from our analytical expressions, for the conversion efficiency as a
function of several key experimental parameters.

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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
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The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th