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High intensity behavior of pyroelectric photorefractive self-focusing in LiNbO3

Abstract : 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.
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Submitted on : Thursday, October 31, 2013 - 12:00:41 PM
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Jassem Safioui, Fabrice Devaux, Kien Phan Huy, Mathieu Chauvet. High intensity behavior of pyroelectric photorefractive self-focusing in LiNbO3. Optics Communications, Elsevier, 2013, 294, pp.294 - 298. ⟨10.1016/j.optcom.2012.12.069⟩. ⟨hal-00878963⟩



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