Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: All-Fiber Source of Polarization-Entangled Photon Pairs Based on a Novel
  Birefringence Compensated Scheme   We propose a new all-fiber source of polarization-entangled photon pairs for
quantum communications. Fiber birefringence is compensated using Faraday
rotator mirror, resulting in enhanced stability against random polarization
drifts compared to existing schemes.

15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio