Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infrared frequency combs and supercontinua for multiplex high
  sensitivity spectroscopy   An infrared high-brightness light source based on supercontinuum generation
through a SF6 photonic crystal fiber seeded by a Cr^4+:YAG femtosecond
oscillator is developed for high resolution multiplex spectroscopy in the 1.5
$\mu$m region. Moreover, a multiplex high resolution approach based on a
Cr^4+:YAG frequency comb enables to probe large spectral domains, with
simultaneous sensitive measurement of the absorption and the dispersion
associated with all individual spectral features.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ