Photorefractive response and parametric scattering processes in periodically poled lithium niobate - Podivilov E; Sturman B; Goul'kov M; Odoulov S; Calvo G; Agulló-López F; Carrascosa M (Photorefractive Effects, Materials, and Devices / G. Salamo and A. Siahmakoun, eds. (OSA Trends in Optics and Photonics , Optical Society of America, 2001), 2001)