66 research outputs found
Quasiphasematched concurrent nonlinearities in periodically poled KTiOPO_4 for quantum computing over the optical frequency comb
We report the successful design and experimental implementation of three
coincident nonlinear interactions, namely ZZZ ("type-0"), ZYY (type-I), and
YYZ/YZY (type-II) second harmonic generation of 780 nm light from a 1560 nm
pump beam in a single, multigrating, periodically poled KTiOPO_4 crystal. The
resulting nonlinear medium is the key component for making a scalable quantum
computer over the optical frequency comb of a single optical parametric
oscillator.Comment: 3 pages, 4 figs, submitted for publicatio
Breathing solitary-pulse pairs in a linearly coupled system
It is shown that pairs of solitary pulses (SPs) in a linearly-coupled system
with opposite group-velocity dispersions form robust breathing bound states.
The system can be realized by temporal-modulation coupling of SPs with
different carrier frequencies propagating in the same medium, or by coupling of
SPs in a dual-core waveguide. Broad SP pairs are produced in a virtually exact
form by means of the variational approximation. Strong nonlinearity tends to
destroy the periodic evolution of the SP pairs.Comment: Optics Letters, in pres
A simple algorithm for the design of accelerating Bessel beams with adjustable features along their propagation
We present an extremely simple method for designing self-accelerating
non-diffracting beams having arbitrary trajectories while their intensity,
width and orbital angular momentum are modulated in a prescribed way along
their propagation. Different beams constructed with this method are
demonstrated experimentally in the paraxial regime and numerically in the
non-paraxial regime
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