Abstract

We report what is believed to be the first experimental observation of spontaneous nucleation of arrays of optical vortices in the process of second-harmonic generation in a crystal with moderate Poynting vector walk-off, pumped with focused beams containing screw phase dislocations. Our experiments were conducted in lithium triborate under conditions of small-efficiency second-harmonic generation pumped by nanosecond pulses at 1064 nm.

© 2002 Optical Society of America

Vortex streets in walking parametric wave mixing

Gabriel Molina-Terriza, Lluis Torner, and Dmitri V. Petrov
Opt. Lett. 24(13) 899-901 (1999)

Multicharged vortex evolution in seeded second-harmonic generation

Gabriel Molina-Terriza and Lluis Torner
J. Opt. Soc. Am. B 17(7) 1197-1204 (2000)

Demonstration of Vortex-Induced Beam Shaping in Seeded Second-Harmonic Generation

Gabriel Molina-Terriza, Stefano Minardi, Alberto Bramati, Paolo Di Trapani, and Lluis Torner
Opt. Express 9(2) 110-115 (2001)

The curious arithmetic of optical vortices

Gabriel Molina-Terriza, Jaume Recolons, and Lluis Torner
Opt. Lett. 25(16) 1135-1137 (2000)

Soliton algebra by vortex-beam splitting

Stefano Minardi, Gabriel Molina-Terriza, Paolo Di Trapani, Juan P. Torres, and Lluis Torner
Opt. Lett. 26(13) 1004-1006 (2001)