Efficient frequency-doubling is experimentally demonstrated in presence of beam self-trapping in congruent lithium niobate crystal. The self-trapping is induced by the generated second harmonic beam via photorefractive effect under an external applied field. The local space charge field distribution, formed by the second harmonic beam, is shown to efficiently trap both wavelengths. The dynamics of self-focusing is studied along with the power evolution of the second harmonic beam. Fast tuning of phase matching conditions in the written waveguide is realized by an externally applied voltage also used for the photorefractive confinement. (c) 2006 Elsevier B.V. All rights reserved.
Frequency-doubling in self-induced waveguides in lithium niobate / Federico, Pettazzi; Virginie, Coda; Mathieu, Chauvet; Fazio, Eugenio. - In: OPTICS COMMUNICATIONS. - ISSN 0030-4018. - STAMPA. - 272:1(2007), pp. 238-241. [10.1016/j.optcom.2006.11.006]
Frequency-doubling in self-induced waveguides in lithium niobate
FAZIO, Eugenio
2007
Abstract
Efficient frequency-doubling is experimentally demonstrated in presence of beam self-trapping in congruent lithium niobate crystal. The self-trapping is induced by the generated second harmonic beam via photorefractive effect under an external applied field. The local space charge field distribution, formed by the second harmonic beam, is shown to efficiently trap both wavelengths. The dynamics of self-focusing is studied along with the power evolution of the second harmonic beam. Fast tuning of phase matching conditions in the written waveguide is realized by an externally applied voltage also used for the photorefractive confinement. (c) 2006 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
