Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Observation of dark pulse in a dispersion-managed fiber ring
  laser"   A recent communication [Opt. Commun. doi:10.1016/j.optcom.2010.06.076 (2010)]
presents experimental results in which dark pulses are observed in a
dispersion-managed (DM) net-anomalous dispersion fiber laser. Disagreement on
the formation mechanism proposed in this communication, we would like to
indicate a more accurate explanation in order to clarify some potential
misunderstanding on dark pulses in fiber lasers.

34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga