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Title: Photorefractive effect at 775 nm in doped lithium niobate crystals

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. % ZrO{sub 2} or with 5.5 mol. % MgO is found to be negligible.
Authors:
; ; ;  [1] ; ; ; ; ;  [2]
  1. Department of Electrical, Computer, and Biomedical Engineering, and CNISM, University of Pavia, 27100 Pavia (Italy)
  2. Physics and Astronomy Departement, University of Padova, 35131 Padova (Italy)
Publication Date:
OSTI Identifier:
22122815
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 3; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BEAMS; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; CRYSTALS; DOPED MATERIALS; LASER RADIATION; LITHIUM COMPOUNDS; MAGNESIUM OXIDES; NIOBATES; PHOTOVOLTAIC EFFECT; REFRACTION; STEADY-STATE CONDITIONS; TIME DEPENDENCE; VISIBLE RADIATION; ZIRCONIUM OXIDES