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  1. ui.adsabs.harvard.edu

    Parametric amplification of laser pulses in plasma has been used to amplify both simple Gaussian pulses as well as higher-order Laguerre-Gaussian modes. However, the amplified beams always had a simple mode of polarisation, only linear or circular. Here we present a novel scheme to amplify seed laser pulses with complex modes of polarisation, so-called Poincaré beams, using default Gaussian ...
    Author:Raoul M. G. M. Trines, Jorge Vieira, Ricardo Fonseca, José Tito da Luz Mendonça, Luís Miguel Oliveir...Published:2017
  2. journals.aps.org

    The amplification of high-order harmonics (HOH) in a plasma-based amplifier is a multiscale, temporal phenomenon that couples plasma hydrodynamics, atomic processes, and HOH electromagnetic fields. We use a one-dimensional, time-dependent Maxwell-Bloch code to compare the natural amplification regime and another regime where plasma polarization is constantly forced by the HOH. In this regime ...
    Author:Eduardo Oliva, Philippe Zeitoun, Marta Fajardo, Guillaume Lambert, David Ros, Stephane Sebban, Pedro...Published:2011
  3. journals.aps.org

    using higher-order laser modes to shape the transverse intensity profile. We first consider the propagation of higher-order laser modes in a parabolic plasma channel. In Sec. II, solutions of the paraxial wave equation, in the low intensitylimitand inthecaseofamatched laser pulse, are presented for different geometries. Issues due to the
  4. link.aps.org

    Higher-order laser modes are analyzed as a method to control focusing forces and improve the electron bunch quality in laser-plasma accelerators. In the linear wake regime, the focusing force is proportional to the transverse gradient of the laser intensity, which can be shaped by a superposition of modes. In particular, the transverse wakefield can be arbitrarily small in a region about the ...
  5. iopscience.iop.org

    Amplification of laser beams via parametric instabilities in plasma (stimulated Raman and Brillouin scattering) has been proposed a number of times [1-5], but came into its own only relatively recently [6-19].This has been accompanied by an increasing effort to optimize the parameters for the interaction via numerical simulations [20-26]. ...
  6. link.springer.com

    Mar 27, 2024This work investigates the complexity involved in extraordinary (E-mode) and ordinary (O-mode) mode in the presence of external magnetic field in self-focusing of higher-order mode of elegant Hermite-cosh-Gaussian laser beams within collisionless magnetized plasma medium. Specifically, complexity in beam width parameters is highlighted through the influence of magnetic field, polarization ...
  7. link.aps.org

    the scattering of laser beams from electron or ion waves. This can be either a deleterious e ect, e.g. loss of energy from stimulated scattering or cross-beam energy transfer [17{19], or a bene cial instability useful for the construc-tion of ultra-high-power plasma-based parametric ampli- ers [20]. Plasma components in high-power lasers avoid
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