Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffraction-managed solitons and nonlinear beam diffusion in modulated
  arrays of optical waveguides   We study propagation of light in nonlinear diffraction-managed photonic
lattices created with arrays of periodically-curved coupled optical waveguides
which were fabricated using femtosecond laser writing in silica glass, and
titanium indiffusion in LiNbO3 crystals. We identify different regimes of the
nonlinear propagation of light beams depending on the input power, and present
the first experimental observation of diffraction-managed solitons, which are
formed as a result of the interplay between the engineered beam diffraction and
nonlinear self-focusing or defocusing. We observe that in self-collimating
structures where linear diffraction is suppressed, a novel regime of nonlinear
beam diffusion takes place at the intermediate powers before the lattice
soliton is formed at higher powers.

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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex