Beam divergence of high-order harmonics generated in the few-optical cycleregime

Authors
Altucci, C Bruzzese, R de Lisio, C Tosa, V Barbiero, P Poletto, L Tondello, G Villoresi, P Nisoli, M Stagira, S Cerullo, G De Silvestri, S Svelto, O
Citation
C. Altucci et al., Beam divergence of high-order harmonics generated in the few-optical cycleregime, J PHYS IV, 11(PR2), 2001, pp. 351-354
Citations number
11
Categorie Soggetti
Physics
Journal title
JOURNAL DE PHYSIQUE IV
ISSN journal
11554339 → ACNP
Volume
11
Issue
PR2
Year of publication
2001
Pages
351 - 354
Database
ISI
SICI code
1155-4339(200107)11:PR2<351:BDOHHG>2.0.ZU;2-V
Abstract
The beam divergence of high-order harmonics generated in Helium by an ultra -short Ti:sapphire laser (7 fs and 30 fs) is experimentally characterized b y means of a flat-field, high-resolution spectrometer. The harmonic beam di vergence is also analysed as a function of the gas-jet position relative to the laser beam waist. Results, which are partly different from previous me asurements performed at longer laser pulse duration, are discussed.