Control of lasing filament arrays in nonlinear liquid media - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2008

Control of lasing filament arrays in nonlinear liquid media

Résumé

Multiple filamentation in a high concentration solution of coumarin 153 in ethanol is studied. It is shown that the output filament pattern may be controlled by placing diffractive elements (circular aperture, edge) in the input beam path. These filaments are formed in highly reproducible arrays along diffraction maxima corresponding to the element used. Experimental results are supported by numerical simulations. They confirm that diffraction-induced intensity gradients swamp modulational instability on the wavefront, forcing filaments to form along diffraction maxima. The effect of two-photon absorption by coumarin molecules on filament patterns is also investigated over a range of dye concentrations. Control results are finally exploited in the production of arrays of localized lasing filaments, which should open novel applications. The resultant lasing sources are mutually coherent and highly repeatable from shot-to-shot, as is shown by their far-field interference patterns.

Dates et versions

hal-00391855 , version 1 (05-06-2009)

Identifiants

Citer

L. Guyon, K.M. Hajek, F. Courvoisier, V. Boutou, R. Nuter, et al.. Control of lasing filament arrays in nonlinear liquid media. Applied Physics B - Laser and Optics, 2008, 90 (3-4), pp.383-390. ⟨10.1007/s00340-007-2914-1⟩. ⟨hal-00391855⟩
95 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More