Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integrated microwave acousto-optic frequency shifter on thin-film
  lithium niobate   Electrically driven acousto-optic devices that provide beam deflection and
optical frequency shifting have broad applications from pulse synthesis to
heterodyne detection. Commercially available acousto-optic modulators are based
on bulk materials and consume Watts of radio frequency power. Here, we
demonstrate an integrated 3-GHz acousto-optic frequency shifter on thin-film
lithium niobate, featuring a carrier suppression over 30 dB. Further, we
demonstrate a gigahertz-spaced optical frequency comb featuring more than 200
lines over a 0.6-THz optical bandwidth by recirculating the light in an active
frequency shifting loop. Our integrated acousto-optic platform leads to the
development of on-chip optical routing, isolation, and microwave signal
processing.

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The categories of this paper are: cs
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph