Nonlinear dynamics of two-color optical vortices in lithium niobate crystals.
We study experimentally the nonlinear dynamics of two-color optical vortex beams in the presence of second-harmonic generation combined with the effects of photo- and thermal refraction, as well as self- and induced-phase modulation. We use an iron-doped lithium niobate crystal as a nonlinear medium for the vortex propagation and observe experimentally, depending on the laser wavelength, a decay of a double-charge vortex, splitting and reshaping of background beam, pattern formation, and controllable nonlinear rotation of a vortex pair.
Dreischuh
Alexander
A
Nonlinear Physics Center, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia.
Neshev
Dragomir N
DN
Kolev
Vesselin Z
VZ
Saltiel
Solomon
S
Samoc
Marek
M
Krolikowski
Wieslaw
W
Kivshar
Yuri S
YS
D003116:Color; D003198:Computer Simulation; D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D009556:Niobium / Q000737:chemistry* / Q000528:radiation effects; D017711:Nonlinear Dynamics; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods
D010087:Oxides; D009556:Niobium; C091692:lithium niobate