In this paper we report self-trapping of subnanojoule femtosecond near-infrared beams in photonic-grade undoped bulk lithium niobate under application of an external dc electric field. We show that the phenomenon occurs thanks to the photorefractive effect induced by a weak second-harmonic component generated under large velocity mismatch. It offers a way to extend lithium niobate's photorefractive response to the near-infrared spectrum for peak intensity lower than 1 GW/cm(2), which is three orders of magnitude lower than reported in the literature.
Self-trapping of low-energy infrared femtosecond beams in lithium niobate / Pettazzi, Federico; Alonzo, Massimo; Centini, Marco; A., Petris; V. I., Vlad; M., Chauvet; Fazio, Eugenio. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 76:(2007), pp. 063818-1-063818-4. [10.1103/PhysRevA.76.063818]
Self-trapping of low-energy infrared femtosecond beams in lithium niobate
PETTAZZI, Federico;ALONZO, Massimo;CENTINI, MARCO;FAZIO, Eugenio
2007
Abstract
In this paper we report self-trapping of subnanojoule femtosecond near-infrared beams in photonic-grade undoped bulk lithium niobate under application of an external dc electric field. We show that the phenomenon occurs thanks to the photorefractive effect induced by a weak second-harmonic component generated under large velocity mismatch. It offers a way to extend lithium niobate's photorefractive response to the near-infrared spectrum for peak intensity lower than 1 GW/cm(2), which is three orders of magnitude lower than reported in the literature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
