Spatial quality improvement of a Ti:Sapphire laser beam by modal filtering - ENSTA Paris - École nationale supérieure de techniques avancées Paris Accéder directement au contenu
Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2015

Spatial quality improvement of a Ti:Sapphire laser beam by modal filtering

Résumé

We present a study on the improvement of the spatial quality of a laser beam, called modal filtering, suitable to high-energy lasers. The method is theoretically compared with the classical pinhole filtering technique in the case of an astigmatic Gaussian beam, illustrating, in this particular case, its efficiency for filtering low spatial frequencies. Experimental study of the modal filtering of a temporally chirped beam from a Ti:Sapphire chirped-pulseamplification system is presented. Beam profile, wavefront and pulse duration after compression were measured, showing a dramatic improvement of beam quality and no modifications of the temporal distribution. High-order harmonic generation in a rare gas, a highly nonlinear process which is phase-matching dependent, was used to test the effect of the filter and showed a clear enhancement of the generation.
Fichier non déposé

Dates et versions

cea-01245780 , version 1 (17-12-2015)

Identifiants

Citer

Benoît Mahieu, David Gauthier, Michel Perdrix, Xunyou Ge, Willem Boutu, et al.. Spatial quality improvement of a Ti:Sapphire laser beam by modal filtering. Applied Physics B - Laser and Optics, 2015, 118 (1), pp.47-60. ⟨10.1007/s00340-014-5953-4⟩. ⟨cea-01245780⟩
296 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More