Laser harmonic generation with independent control of ... - Nature
Aug 11, 2024 · The authors present the generation of laser harmonics with tunable orbital angular momentum by directing a laser at shaped targets. The combined frequency and OAM spectrum can be controlled...
High-purity orbital angular momentum states from a visible ... - Nature
Apr 27, 2020 · Our laser conveniently outputs in the visible, producing new OAM states of light as well as all previously reported OAM modes from lasers, offering a compact and power-scalable source that...
On-demand orbital angular momentum comb from a digital laser
Photonic orbital angular momentum (OAM) carried by phase-structured vortex light is an important and promising resource for the ever-increasing demand towards high-capacity data information due to its intrinsic unlimited dimensionality. Large superpositions of OAM are easy to be produced, but on-demand generation of arbitrary OAM spectra such as an OAM comb similar to a frequency comb is still ...
Orbital angular momentum spectra of twisted Laguerre-Gaussian …
The presence of atmospheric turbulence in a beam propagation path results in the spread of orbital angular momentum (OAM) modes of laser beams, limiting the performance of free-space optical communications with the utility of vortex beams.
Evolution of orbital angular momentum spectrum of broadband …
Jan 2, 2023 · In this study, we numerically simulate the evolution of the orbital angular momentum (OAM) spectrum of a vortex laser beam in the optical parametric chirped pulse amplification (OPCPA) process,...
Controlled Generation of Orbital Angular Momentum Beams With …
Jul 1, 2024 · We report on versatile orbital angular momentum beam generation through the association of a 61-channels coherent beam combining digital laser and a liquid-crystal q-plate. Particularly, high-order vortex beams that carry orbital angular momentum are generated with radial, azimuthal and/or circular polarization states.
High-order harmonic generation from aligned HCN molecules …
Apr 13, 2023 · Molecular high-order harmonic generation and molecular orbital ionization probabilities are calculated under orthogonally and linearly polarized two-color laser fields.
High Harmonic Generation from Multiple Orbitals in N 2
Nov 21, 2008 · Molecular electronic states energetically below the highest occupied molecular orbital (HOMO) should contribute to laser-driven high harmonic generation (HHG), but this behavior has not been observed previously.
Spectral control of the orbital angular momentum of a laser …
Jun 8, 2020 · This paper examines the spectral properties of a spiral phase plate (SPP) generating orbital angular momentum (OAM) beams. A simple method is proposed for calculating the resulting OAM by measuring only two maximum expansion coefficients.
Controlling circularly polarized high-order harmonic generation …
Sep 30, 2019 · We describe the laser induced electron dynamics in a rotating frame to examine recollision dynamics and Coriolis effects. The resulting modulation of HHG spectra arises from a combination of two bicircular fields with counter-rotating and co-rotating components.