Non-linear light scattering in photorefractive LiNbO3 crystals studied by Z-scan technique
- 30 Downloads
Experimental study of non-linear scattering (NLS) in nominally pure, Mg- and Zr-doped LiNbO3 crystals with a varying dopant concentration are reported in this paper. The study is undertaken by Z-scan technique with a cw-excitation at 514.5 nm. A modified open-aperture Z-scan experimental setup is used to evaluate the contributions of NLS in the observed transmission attenuation. Study of these open-aperture Z-scan traces shows that NLS has marked magnitude at moderate and high light intensities in undoped, strongly Zr-doped and Mg-doped LiNbO3, and a very significant magnitude in the moderately Zr-doped LiNbO3 crystals even at low intensities. NLS is related to the photoinduced light scattering (PILS), which is explained by holographic amplification of the seed scattering due to photorefractive effect.
S.M. Kostritskii, O.G. Sevostyanov, and E. Kokonyan thank the RFBR for support under Grant no. 18-52-05012.
- 8.F.Z. Henari, K. Cazzini, F.E. Akkari, W.J. Blau, Beam waist changes in lithium niobate during Z-scan measurement. Appl. Phys. Lett. 78, 1373–1375 (1995)Google Scholar
- 9.MdM Parvez, Experimental studies on the nonlinear optical properties of LiNbO3 crystals. Am. J. Sci. Ind. Res. 6, 69–73 (2015)Google Scholar
- 23.E. Kokanyan, E.J. Dieguez, New perspectives of lithium niobate crystals. Optoelectr. Adv. Mater. 2, 205–214 (2000)Google Scholar
- 38.M.A. Ellabban, M. Fally, R.A. Rupp, T. Woike, M. Imlau, Holographic scattering and its applications, in Recent Research Developments in Applied Physics, vol. 4, ed. by S. Pandalai (Transworld Publishing, India, 2001), pp. 241–275Google Scholar
- 39.M. Imlau, Th. Woike, M. Fally, M. Ellaban, R. A. Rupp and M. Goulkov, Non-linear light scattering in polar oxides at the example of strontium-barium-niobate. in R. Wasser, U. Bottger, S. Tiedke (Editors) Proceedings of POLECER Conference, Chapter VII, 148 (2003)Google Scholar