Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultra-Narrow Faraday Rotation Filter at the Rb D1 Line   We present a theoretical and experimental study of the ultra-narrow bandwidth
Faraday anomalous dispersion optical filter (FADOF) operating at the rubidium
D1 line (795 nm). This atomic line gives better performance than other lines
for the main FADOF figures of merit, e.g. simultaneously 71% transmission, 445
MHz bandwidth and 1.2 GHz equivalent noise bandwidth.

9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc