Publication: Amplitude gratings generation by selective defect bleaching in KCl:CO_3K_2 crystals
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2008-05
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Springer-Verlag
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Abstract
Volume grating formation by spatially-selective defect bleaching is demonstrated in coloured KCl:CO_3K_2 crystals. The sample is coloured by a train of pulses with a wavelength of λ= 266 nm and bleached with a cw Ar-laser with a wavelength of λ= 514.5 nm. Diffraction efficiency for a 1.6 μm grating period is studied both experimentally and theoretically, using the evolution of colour centre concentration. Hologram recording parameters are obtained and the evolution of the spatial grating profile is discussed. Diffraction efficiencies three times higher than previously published efficiencies are obtained.
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© Springer-Verlag 2008.
This work was partially supported by the Spanish Ministry of Education and Science under project TEC2005-02180, by ANPCyT (Argentina) under project PICT-15210 and by CONICET(Argentina) under project PIP 5997.
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