Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hollow-core fiber Characterization with Correlation-Optical Time Domain
  Reflectometry   Using a Correlation-OTDR, we characterized the temperature-induced group
delay variations of two nested antiresonant nodeless hollow core fibers. The
temperature sensitivity of both is substantially less than for SSMF with some
dependency on coating type.

25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph