Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic polymer-dispersed liquid crystal Bragg grating integrated
  inside a solid core photonic crystal fiber   A polymer/liquid crystal-based fiber Bragg grating (PLC-FBG) is fabricated
with visible two-beam holography by photo-induced modulation of a
pre-polymer/LC solution infiltrated into the hollow channels of a solid core
photonic crystal fiber (PCF). The fabrication process and effects related to
the photonic bandgap guidance into the infiltrated PCF, and characterization of
the PLC-FBG are discussed. Experimental data here presented, demonstrate that
the liquid crystal inclusions of the PLC-FBG lead to high thermal and bending
sensitivities. The microscopic behavior of the polymer/liquid crystal phase
separation inside the PCF capillaries is examined using scanning electron
microscopy, while further discussed.

36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con