Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenological model for spectral broadening of incoherent light in
  fibers via self-phase modulation and dispersion   A phenomenological model for spectral broadening of incoherent light in
silica fibers via self-phase modulation and dispersion is presented, aiming at
providing a qualitative and readily accessible description of incoherent light
spectral broadening. In this model, the incoherent light is approximated by a
cosine power-modulated light with modulation parameters depending on the
coherent time and the dispersion in fibers. A simple and practical method for
spectral broadening predictions is given and demonstrated by both the
straightforward NLSE-based numerical modeling and series of experiments
including narrowband and broadband incoherent light in passive fibers and fiber
amplifiers.

24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
2
The categories of this paper are: math