Few-optical-cycle light pulses, produced by the hollow-fiber compression technique, are used to generate highorder harmonics with excellent spatial characteristics at wavelengths as short as 10 nm. We show that the spatial features of the harmonic radiation are strongly affected by the spatial profile of the excitation beam. The role of the fundamental beam shape has been carefully investigated by means of numerical simulations. The use of a fundamental beam with truncated Bessel radial intensity profile, produced upon propagation along a hollow fiber, allows us to obtain low-divergence, highbrightness harmonic radiation.
The Role of Beam Profile in High-Order Harmonic Generation by Few-Optical-Cycle Pulses / M., Nisoli; E., Priori; G., Sansone; S., Stagira; G., Cerullo; S., De Silvestri; Altucci, Carlo; Bruzzese, Riccardo; DE LISIO, Corrado; P., Villoresi; L., Poletto; M., Pascolini. - In: APPLIED PHYSICS. B, LASERS AND OPTICS. - ISSN 0946-2171. - STAMPA. - 74:(2002), pp. s11-s15. [10.1007/s00340-002-0897-5]
The Role of Beam Profile in High-Order Harmonic Generation by Few-Optical-Cycle Pulses
ALTUCCI, CARLO;BRUZZESE, RICCARDO;DE LISIO, CORRADO;
2002
Abstract
Few-optical-cycle light pulses, produced by the hollow-fiber compression technique, are used to generate highorder harmonics with excellent spatial characteristics at wavelengths as short as 10 nm. We show that the spatial features of the harmonic radiation are strongly affected by the spatial profile of the excitation beam. The role of the fundamental beam shape has been carefully investigated by means of numerical simulations. The use of a fundamental beam with truncated Bessel radial intensity profile, produced upon propagation along a hollow fiber, allows us to obtain low-divergence, highbrightness harmonic radiation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
