Sturman, B., Aguilar, M., Agulló-López, F., Pruneri, V. and Kazansky, P.G.
Photorefractive properties of periodically poled LiNbO3
At Photorefractive Materials Effects and Devices, Japan.
11 - 13 Jun 1997.
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We study theoretically the photorefractive response of periodically poled LiNbO3 crystals with dominating photovoltaic transport. Strong suppression of the photorefractive effects at low spatial frequencies (in comparison with the single-domain case) and preservation of these effects for short fringe spacings are shown. We also describe a new kind of photorefractive wave coupling, which is forbidden for single domain crystals. It is characterized by wave propagation angles, dependent on the domain inversion period, and by a large gain factor
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