Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast Generation and Detection of Spatial Modes of Light using an
  Acousto-Optic Modulator   Spatial modes of light provide a high-dimensional space that can be used to
encode both classical and quantum information. Current approaches for
dynamically generating and measuring these modes are slow, due to the need to
reconfigure a high-resolution phase mask such as a spatial light modulator or
digital micromirror device. The process of updating the spatial mode of light
can be greatly accelerated by multiplexing a set of static phase masks with a
fast, image-preserving optical switch, such as an acousto-optic modulator
(AOM). We experimentally realize this approach, using a double-pass AOM to
generate one of five orbital angular momentum states with a switching rate of
up to 500 kHz. We then apply this system to perform fast quantum state
tomography of spatial modes of light in a 2-dimensional Hilbert space, by
projecting the unknown state onto six spatial modes comprising three mutually
unbiased bases. We are able to reconstruct arbitrary states in under 1 ms with
an average fidelity of 96.9%.

9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess