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High intensity behavior of pyroelectric photorefractive self-focusing in LiNbO3

par Safioui, Jassem ;Devaux, Fabrice;Phan Huy, Kien ;Chauvet, Mathieu M.
Référence Optics communications, 294, page (294-298)
Publication Publié, 2013-05

Article révisé par les pairs

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Résumé :

The formation of self-confined beams using pyroelectric effect is numerically and experimentally studied in photorefractive LiNbO3. For a given crystal temperature change, the trapped beam width is shown to be less efficient as intensity is increased. Numerical calculations reveal that the induced refractive-index profile varies along propagation for large intensities due to a nonlinear photovoltaic effect. Moreover, it eventually gives beam splitting for intensities greater than a threshold intensity that depends on LiNbO3 composition. © 2013 Elsevier B.V.