Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The anisotropic Kerr nonlinear refractive index of the beta-barium
  borate (\beta-BaB2O4) nonlinear crystal   We study the anisotropic nature of the Kerr nonlinear response in a
beta-barium borate (\beta-BaB2O4, BBO) nonlinear crystal. The focus is on
determining the relevant $\chi^{(3)}$ cubic tensor components that affect
interaction of type I cascaded second-harmonic generation. Various experiments
in the literature are analyzed and we correct the data from some of the
experiments for contributions from cascading as well as for updated material
parameters. We find that the Kerr nonlinear tensor component responsible for
self-phase modulation in cascading is considerably larger than what has been
used to date. We evaluate the impact of using such a cubic anisotropic response
in ultrafast cascading experiments.

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The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga