Comparison of second harmonic generation efficiency in alumo- and germanosilicate glasses at volumetric optical poling

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The second harmonic generation is investigated on microperiodic gratings of nonlinear polarizability photointegrated at volumetric optical poling in alumo- and germanosilicate glasses. The comparison shows the significant impact of nitrogen, phosphorus, and rare-earth element additions. The developed theory of nonlinear-frequency conversion in case of current mechanism allowed to estimate the characteristics and magnitudes of photointegrated nonlinearities in glasses. The sharp dependence of the harmonic generation efficiency on intensity of the component of poling radiation was detected because of the possible influence of photoconductivity, which must be considered when developing perspective samples with photointegrated gratings.

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Sobre autores

L. Vostrikova

Rzhanov Institute of Semiconductor Physics of the Siberian Branch of the of Russian Academy of Sciences

Autor responsável pela correspondência
Email: vostrik@isp.nsc.ru
Rússia, Novosibirsk

l. Kartashev

Rzhanov Institute of Semiconductor Physics of the Siberian Branch of the of Russian Academy of Sciences

Email: vostrik@isp.nsc.ru
Rússia, Novosibirsk

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2. Fig. 1. Schematic diagram of the experimental setup: 1 — YAG: Nd3+ laser, 2 — second harmonic converter based on a KTP crystal, 3 — phase-shifting plate, 4 — Glan prism with beveled edges, 5–7 — mirrors, 8, 9 — filters for fundamental and doubled frequency radiation, 10 — shutter, 11 — polarizing element, 12 — lens, 13 — sample, 14 — light guide, 15 — photomultiplier, 16 — voltage strobe converter, 17 — photodiode, 18 — computer.

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3. Fig. 2. Maxima of SHG efficiency at different intensities of polling radiation with a wavelength of λ = 532 nm.

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