The photorefractive effect induced by 775-nm laser light on doped lithium niobate crystals is investigated by the direct observation in the far field of the transmitted-beam distortion as a function of time. Measurements performed at various Zr-doping concentrations and different light intensities show that the 775-nm light beam induces a steady-state photorefractive effect comparable to that of 532-nm light, but the observed build-up time of the photovoltaic field is longer by three-orders of magnitude. The 775-nm photorefractivity of lithium niobate crystals doped with 3 mol.% ZrO2 or with 5.5mol.% MgO is found to be negligible.

Photorefractive effect at 775 nm in doped lithium niobate crystals

NAVA, GIOVANNI;MINZIONI, PAOLO;CRISTIANI, ILARIA;DEGIORGIO, VITTORIO
2013-01-01

Abstract

The photorefractive effect induced by 775-nm laser light on doped lithium niobate crystals is investigated by the direct observation in the far field of the transmitted-beam distortion as a function of time. Measurements performed at various Zr-doping concentrations and different light intensities show that the 775-nm light beam induces a steady-state photorefractive effect comparable to that of 532-nm light, but the observed build-up time of the photovoltaic field is longer by three-orders of magnitude. The 775-nm photorefractivity of lithium niobate crystals doped with 3 mol.% ZrO2 or with 5.5mol.% MgO is found to be negligible.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/804433
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