Use ofdiffraction-f ree beams to generate low-order harmonics in xenon jets has been investigated. Nearly diffractionless beams have been generated from a Ti : sapphire, 100 fs, laser system by focussing ring-type radiation, which has been produced in two different ways: either, by inserting an annular slit into the incident Gaussian beam, or by placing a doublet of axicons in a vertex-to-vertex configuration before the focussing lens. The results obtained with the first scheme are discussed and interpreted in terms ofa simple perturbative model ofthe harmonic generation (HG) process. The first measurements performed with the doublet of axicons are also reported and discussed.
Diffractionless beams and their use for harmonic generation / Altucci, Carlo; Bruzzese, Riccardo; DE LISIO, Corrado; A., Porzio; Solimeno, Salvatore; V., Tosa. - In: OPTICS AND LASERS IN ENGINEERING. - ISSN 0143-8166. - STAMPA. - 37:(2002), pp. 565-576. [10.1016/S0143-8166(01)00137-3]
Diffractionless beams and their use for harmonic generation
ALTUCCI, CARLO;BRUZZESE, RICCARDO;DE LISIO, CORRADO;SOLIMENO, SALVATORE;
2002
Abstract
Use ofdiffraction-f ree beams to generate low-order harmonics in xenon jets has been investigated. Nearly diffractionless beams have been generated from a Ti : sapphire, 100 fs, laser system by focussing ring-type radiation, which has been produced in two different ways: either, by inserting an annular slit into the incident Gaussian beam, or by placing a doublet of axicons in a vertex-to-vertex configuration before the focussing lens. The results obtained with the first scheme are discussed and interpreted in terms ofa simple perturbative model ofthe harmonic generation (HG) process. The first measurements performed with the doublet of axicons are also reported and discussed.File | Dimensione | Formato | |
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