Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Space-Division Multiplexing for Microwave Photonics   Despite Space division multiplexing fibers were initially envisioned as pure
transmission media, they exhibit as well great potential for signal processing.
We review here different solutions we developed for microwave signal processing
devices and links.

11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc