Broadband bright twin beams and their upconversionстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 7 марта 2018 г.
Аннотация:We report on the observation of broadband (40 THz)
bright twin beams through high-gain parametric downcon-
version in an aperiodically poled lithium niobate crystal.
The output photon number is shown to scale exponentially
with the pump power and not with the pump amplitude, as
in homogeneous crystals. Photon number correlations and
the number of frequency/temporal modes are assessed by
spectral covariance measurements. By using sum-frequency
generation on the surface of a non-phase-matched crystal,
we measure a cross-correlation peak with the temporal
width of 90 fs.