Abstract
Optical properties and nonlinear optical response due to the CW and pulsed laser radiation self-action at 532nm were studied in composites based on KDP single crystals with incorporated nanofibriles of nanostructured oxyhydroxide of aluminum (NOA). It was shown a high optical quality and structural homogeneity of nanocomposites KDP:NOA by the transmittance spectra, elastic optical scattering and XRD analysis. It was observed manifestation of the second harmonic generation efficiency enhancement in the KDP:NOA versus the nominally pure KDP (λ=1064nm, τ=1ns) that is correlated with efficient refractive index self-modulation Δn∼10−4 (λ=532nm, τ=30ps). In the pyramidal and prismatic growth sectors of the nominally pure KDP crystal it was shown opposite signs of the photoinduced variations both of the refractive index and of the optical absorption/bleaching due to resonant excitation of the native defects at 532nm. It should be considered for the wide-aperture laser frequency KDP family based convertors fabrication.
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