Self-organized bundle of lasing filaments in dense media

L. Guyon (1) , F. Courvoisier (1) , V. Boutou (1) , R. Nuter (2) , A. Vincotte (2) , S. Champeaux (2) , L. Berge (2) , P. Glorieux (3) , J.-P. Wolf (1)

1 LASIM - Laboratoire de Spectrométrie Ionique et Moléculaire
2 DPTA - Département de Physique Théorique et Appliquée
3 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

The filamentation of powerful, ultrashort laser pulses in liquids is investigated. It is shown that the multiple filaments produced in ethanol can be modified into controllable, regular patterns by doping the medium with dyes at high concentrations. Experimental results are confirmed by three-dimensional numerical simulations. Pump-dump pulse experiments furthermore reveal that the stimulated emission from excited dye molecules in the bundle can be locked in phase and leads to bright interference patterns.

Mots clés: ULTRASHORT LASER-PULSES; WHITE-LIGHT FILAMENTS; LIQUID METHANOL; OPTICAL NONLINEARITY; REFRACTIVE-INDEX; PROPAGATION; IONIZATION; ABSORPTION; COUMARINS; EVOLUTION

Domaines: Optique [physics.optics]

L. Guyon, F. Courvoisier, V. Boutou, R. Nuter, A. Vincotte, et al.. Self-organized bundle of lasing filaments in dense media. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2006, 73 (5), pp.051802. ⟨10.1103/PhysRevA.73.051802⟩. ⟨hal-00960240⟩