Influence of different impurities on light-induced scattering in doped LiNbO3 crystals

Goulkov, M.; Jäkel, G.; Krätzig, E.; Odoulov, S.; Schulz, R.

doi:10.1016/0925-3467(94)00078-6

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…These rings have been attributed to the two processes A: (ee → oo) and A: (ee → eo). Phase conditions and relations between cone and pump angles have been deduced [177]. The further scattering patterns shown in Figure 4.19 have been identified, too.…”

Section: Holographic Scatteringmentioning

confidence: 78%

“…Two extraordinarily polarized rings appear (marked as 1 and 2 in Figure 4.18) inside the area of the pump beams. The phase-matching conditions of the involved processes A: (oo → oe) and A: (oo → ee) and the relations between cone and pump angles have been deduced [177]. For LiNbO 3 :Cu these anisotropic rings do not appear.…”

Section: Holographic Scatteringmentioning

confidence: 94%

“…LiNbO 3 and LiTaO 3 crystals are especially well suited for the investigation of these processes, as can be seen from the above review [162] and the references therein. In the present contribution we will restrict attention to the influence of impurities on light-induced scattering patterns [177]. This influence is of particular importance if refractive index gratings are recorded by orthogonally polarized waves via the bulk photovoltaic tensor element β 113 = β s 131 + iβ a 131 .…”

Section: Holographic Scatteringmentioning

confidence: 99%

“…Light-induced scattering pattern for two ordinarily polarized pump beams (λ = 440 nm) observed on a screen behind an x-cut LiNbO 3 :Fe crystal with the c-axis perpendicular to the plane of incidence. The extraordinarily polarized rings are marked as 1 and 2[177].…”

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confidence: 99%

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Photorefractive Effects in LiNbO3 and LiTaO3

Buse

Imbrock

Krätzig

et al.

Photorefractive Materials and Their Applications 2

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Lithium niobate (LiNbO 3 ) and lithium tantalate (LiTaO 3 ) crystals have gained increasing interest during recent years because of their fascinating physical properties, such as piezoelectricity, ferroelectricity, pyroelectricity, birefringence, electrooptical, and nonlinear-optic effects. These properties have been successfully utilized for applications in various fields. Basic experiments on acoustic surface wave propagation, electrooptical modulation, optical wave guiding, second harmonic generation, and pyroelectric detection have been performed with these crystals.LiNbO 3 and its isomorphous compound LiTaO 3 are not found in nature. The first successful growth of large single crystals by the Czochralski technique was reported by Ballman [1]. A peculiarity results from the fact that the congruently melting composition (about 48.4 mol % Li 2 O) does not coincide with the stoichiometric one (50 mol % Li 2 O). The crystals have a perovskite-like structure with oxygen octahedra and are trigonal with only one structural phase transition (paraelectric-ferroelectric) at the Curie temperature T c of about 1150 • C for LiNbO 3 and about 610 • C for LiTaO 3 . The nonpolar high-temperature phase belongs to the space group R3c (point group 3m) and at T c the transition to the ferroelectric low-temperature phase of the space group R3c (point group 3m) occurs. At room temperature LiNbO 3 is negatively birefringent. The birefringence of LiTaO 3 is very small at room temperature and positive for the congruently melting composition. More information about growth and fundamental properties of LiNbO 3 can be found in [2,3]. 83

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Section: Holographic Scatteringmentioning

confidence: 78%

Section: Holographic Scatteringmentioning

confidence: 94%

Section: Holographic Scatteringmentioning

confidence: 99%

mentioning

confidence: 99%

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Photorefractive Effects in LiNbO3 and LiTaO3

Buse

Imbrock

Krätzig

et al.

Photorefractive Materials and Their Applications 2

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“…The LIS phenomenon is often observed in photorefractive crystals. Over the past 30 years this phenomenon has been extensively investigated both experimentally and theoretically [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The origin of this nonlinear phenomenon is quite clear.…”

Section: Introductionmentioning

confidence: 99%

Light-induced diffraction in thermally reduced congruent and near-stoichiometric Er:LiNbO₃crystals

Zhang

Zhuang

Zhang

et al. 2005

Journal of Modern Optics

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Pun (2005) Light-induced diffraction in thermally reduced congruent and near-stoichiometric Er:LiNbO 3 crystals, Journal of Modern Optics, 52:15, 2105-2126, A polarization-isotropic two-colour light-induced diffraction (LID) phenomenon from thermally reduced congruent and near-stoichiometric Er:LiNbO 3 crystals was observed when these crystals were exposed to superposed 632.8 nm probe and 488 nm pump beams. The LID is characterized by expansion of the probe beam spot and the appearance of alternate bright and dark diffraction rings at higher pump light intensities. This phenomenon is absent not only in all other Er-doped crystals which either were as grown or had experienced other postgrowth treatments such as vapour transport equilibration (VTE), oxidation and strong annealing but also in a pure VTE-treated crystal even though the crystal was subjected to the same reduction procedure. The LID characteristics of five reduced crystals, which have different Li-to-Nb ratios and different doping levels of Er 3þ , were studied in detail by changing the light intensity, polarization state and wave vector direction of both the pump and the probe beams. The origin of the LID was investigated from the viewpoints of the red fluorescence of Er 3þ excited by a 488 nm pump beam, light-induced scattering and light-induced thermal nonlinearity. The results have shown that the thermal nonlinearity mechanism is preferred as it can reasonably explain almost all the observed experimental phenomena.

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Optical Materials and Their Properties

Brinkmann¹,

Hayden²,

Letz

et al. 2012

Springer Handbook of Lasers and Optics

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Influence of different impurities on light-induced scattering in doped LiNbO3 crystals

Cited by 8 publications

References 7 publications

Photorefractive Effects in LiNbO3 and LiTaO3

Photorefractive Effects in LiNbO3 and LiTaO3

Light-induced diffraction in thermally reduced congruent and near-stoichiometric Er:LiNbO₃crystals

Optical Materials and Their Properties

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Influence of different impurities on light-induced scattering in doped LiNbO3 crystals

Cited by 8 publications

References 7 publications

Photorefractive Effects in LiNbO3 and LiTaO3

Photorefractive Effects in LiNbO3 and LiTaO3

Light-induced diffraction in thermally reduced congruent and near-stoichiometric Er:LiNbO3crystals

Optical Materials and Their Properties

Contact Info

Product

Resources

About

Light-induced diffraction in thermally reduced congruent and near-stoichiometric Er:LiNbO₃crystals