Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Femtosecond-laser-pulse characterization and optimization for CARS
  microscopy   We present a simple method and its experimental implementation to completely
determine the characteristics of the pump-and-probe pulse and the Stokes pulse
in a coherent anti-Stokes Raman scattering microscope at sample level without
additional autocorrelators. Our approach exploits the delay line, ubiquitous in
such microscopes, to perform a convolution of the pump-and-probe and Stokes
pulses as a function of their relative delay and it is based on the detection
of the photons emitted from an appropriate non-linear sample. The analysis of
the non-resonant four-wave-mixing and sum-frequency-generation signals allows
retrieving the pulse duration on the sample and the chirp of each pulse. This
knowledge is crucial in maximizing the spectral-resolution and contrast in CARS
imaging.

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The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat