Planar second-harmonic generation with noncollinear pumps in disordered media.
We study experimentally the process of the second harmonic generation by two noncollinear beams in quadratic nonlinear crystals with a disordered structure of ferroelectric domains. We show that the second-harmonic radiation is emitted in the form of two cones as well as in a plane representing the cross-correlation of the two fundamental pulses. We demonstrate the implementation of this parametric process for characterisation of femtosecond pulses, enabling the estimation of pulse width, chirp, and front tilt. This is achieved through monitoring the evolution of the autocorrelation trace inside the nonlinear crystal.
Roppo
Vito
V
Departament de Fisica i Enginyeria Nuclear, Escola Técnica Superior d'EnginyeriesIndustrial, y Aeronáutica de Terrassa, Universitat Politécnica de Catalunya, 08222 Terrassa, Barcelona, Spain.
Dumay
David
D
Trull
Jose
J
Cojocaru
Crina
C
Saltiel
Solomon M
SM
Staliunas
Kestutis
K
Vilaseca
Ramon
R
Neshev
Dragomir N
DN
Krolikowski
Wieslaw
W
Kivshar
Yuri S
YS
D003198:Computer Simulation; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation