Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Frequency correlation requirements on the biphoton wavefunction in an
  induced coherence experiment between separate sources   There is renewed interest in using the coherence between beams generated in
separate down-converter sources for new applications in imaging, spectroscopy,
microscopy and optical coherence tomography (OCT). These schemes make use of
continuous wave (CW) pumping in the low parametric gain regime, which produces
frequency correlations, and frequency entanglement, between signal-idler pairs
generated in each single source. But can induced coherence still be observed if
there is no frequency correlation, so the biphoton wavefunction is factorable?
We will show that this is the case, and this might be an advantage for OCT
applications. High axial resolution requires a large bandwidth. For CW pumping
this requires the use of short nonlinear crystals. This is detrimental since
short crystals generate small photon fluxes. We show that the use of ultrashort
pump pulses allows improving axial resolution even for long crystal that
produce higher photon fluxes.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph