Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of nonlinearity in the pass-through optics on femtosecond laser
  filament in air   An influence of pass-through optics on femtosecond laser pulse filamentation
in ambient air is analyzed for the first time both experimentally and
numerically. Propagation of high-power femtosecond laser pulse through solid
optical elements introduces spatiotemporal phase modulation due to the Kerr
effect. This modulation may have a strong ef-fect on the pulse filamentation in
air. We demonstrated that the phase modulation obtained in the thin
pass-through dielectric plate reduces the distance to the filament onset and
increases the plasma channel length

19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th