Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparing free-space and fibre-coupled detectors for Fabry-P\'erot based
  all-optical photoacoustic tomography   All-optical ultrasound detection bears unique advantages for photoacoustics,
including wider detection bandwidth, higher signal-to-noise per unit area and
lower susceptibility to electromagnetic noise. These benefits have established
optical ultrasound detection as a key method for photoacoustic applications in
biology and medicine. However, the use of free-space detectors renders this
approach sensitive to optical aberrations, which can degrade the pressure
sensitivity and result in deteriorated image quality. While spatial
mode-filtering through fibers has been proposed to alleviate these problems in
Fabry-P\'erot based pressure sensors, their real functional advantage has never
been properly investigated. In this paper we rigorously and quantitatively
compare the performance of free-space and fibre-coupled detectors in a custom
correlative setup. We demonstrate the superiority of the latter in terms of
both signal level and image quality in realistic all-optical photoacoustic
tomography settings.

15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th