Self-Guided Propagation of Ultrashort Laser Pulses in the Anomalous Dispersion Region of Transparent Solids: A New Regime of Filamentation

Magali Durand (1) , Amélie Jarnac (1) , Aurélien Houard (1) , Yi Liu (1) , Stéphanie Grabielle (2) , Nicolas Forget (2) , Anne Durécu (3) , Arnaud Couairon (4) , André Mysyrowicz (1)

1 ILM - Interaction Laser-Matière
2 FASTLITE
3 ONERA - The French Aerospace Lab [Châtillon]
4 CPHT - Centre de Physique Théorique [Palaiseau]

We report measurements concerning the propagation of femtosecond laser pulses in fused silica with a wavelength at 1.9 μm falling in the negative group velocity dispersion region. Under sub-GW excitation power, stable filaments are observed over several cm showing the emergence of nonspreading pulses both in space and time. At higher excitation powers, one observes first multiple pulse splitting followed by the emergence of the quasispatiotemporal solitary filament. These results are well reproduced by numerical simulations.

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Magali Durand, Amélie Jarnac, Aurélien Houard, Yi Liu, Stéphanie Grabielle, et al.. Self-Guided Propagation of Ultrashort Laser Pulses in the Anomalous Dispersion Region of Transparent Solids: A New Regime of Filamentation. Physical Review Letters, 2013, 110 (11), pp.115003. ⟨10.1103/PhysRevLett.110.115003⟩. ⟨hal-00852051⟩