E. Kratzig and O. F. Schirmer, Photorefractive Materials and Their Applications I, chapitre Photorefractive centers in electro-optic crystals, pp.131-166, 1988.

T. Volk and M. , Wohlecke : Lithium Niobate Defects, Photorefraction and Ferroelectric Switching, springer Series in Materials Science ´ edition, 2008.

K. Peithmann, A. Wiebrock, and K. Buse, Photorefractive properties of highly-doped lithium niobate crystals in the visible and near-infrared, Applied Physics B: Lasers and Optics, vol.68, issue.5, pp.777-784, 1999.
DOI : 10.1007/s003400050704

K. Buse, Light-induced charge transport processes in photorefractive crystals II: Materials, Applied Physics B: Lasers and Optics, vol.64, issue.4, pp.391-407, 1997.
DOI : 10.1007/s003400050190

P. Gunter and J. Huignard, Photorefractive Materials and Their Applications 1 Basic Effects, Series in Optical Sciences ´ edition, 2006.

G. Tarasova, G. Battaglin, and . Maggioni, Compositional and structural analysis of iron doped x-cut lithium niobate crystals, Materials Science and Engineering B, vol.118, pp.155-159, 2005.

D. Kip, Photorefractive waveguides in oxide crystals: fabrication, properties, and applications, Applied Physics B: Lasers and Optics, vol.67, issue.2, pp.131-150, 1998.
DOI : 10.1007/s003400050485

R. Mouras, M. D. Fontana, P. Bourson, and A. V. Postnikov, Lattice site of Mg ion in LiNbO 3 crystal determined by Raman spectroscopy, Journal of Physics : Condensed Matter, issue.12, pp.5053-5059, 2000.

F. Abdi, M. Aillerie, M. D. Fontana, P. Bourson, T. Volk et al., Influence of Zn doping on electrooptical properties and structure parameters of lithium niobate crystals, Applied Physics B: Lasers and Optics, vol.68, issue.5, pp.795-799, 1999.
DOI : 10.1007/s003400050706

R. Hammoum, M. D. Fontana, M. Gilliot, P. Bourson, and E. P. Kokanyan, Site spectroscopy of Hf doping in Hf-doped crystals, Solid State Communications, vol.149, issue.43-44, pp.1967-1970, 2009.
DOI : 10.1016/j.ssc.2009.07.035

URL : https://hal.archives-ouvertes.fr/hal-00448464

R. Mouras, M. D. Fontana, M. Mostefa, and P. Bourson, Photorefractive properties probed by Raman spectroscopy in Fe-doped LiNbO3, Journal of the Optical Society of America B, vol.23, issue.9, pp.1867-1871, 2006.
DOI : 10.1364/JOSAB.23.001867

URL : https://hal.archives-ouvertes.fr/hal-00327250

D. R. Lovett, Tensor properties of crystals, 1989.

A. Harhira, Photoluminescence polaron dans le niobate de lithium : approche expérimentale et modélisation, Thèse de doctorat, 2007.

P. F. Bordui, R. G. Norwood, C. D. Bird, and G. D. , Compositional uniformity in growth and poling of large-diameter lithium niobate crystals, Journal of Crystal Growth, vol.113, issue.1-2, pp.61-68, 1991.
DOI : 10.1016/0022-0248(91)90009-T

I. Baumann, P. Rudolph, D. Krabe, and R. Schalge, Orthoscopic investigation of the axial optical and compositional homogeneity of Czochralski grown LiNbO3 crystals, Journal of Crystal Growth, vol.128, issue.1-4, pp.903-908, 1993.
DOI : 10.1016/S0022-0248(07)80067-4

K. Polgar, A. Peter, L. Kovacs, G. Corradi, and . Zs, Szaller : Growth of stoichiometric LiNbO 3 single crystal by top seeded solution growth method, Journal of Crystal Growth, vol.177, pp.3-4211, 1997.

A. Ballman, Growth of Piezoelectric and Ferroelectric Materials by the CzochraIski Technique, Journal of the American Ceramic Society, vol.48, issue.2, pp.112-113, 1965.
DOI : 10.1111/j.1151-2916.1965.tb11814.x

A. M. Prokhorov and Y. S. , Kuz'minov : Physics and chemistry of crystalline lithium niobate The Adam Hilger Series on Optics and Optoelectronicséditiontoelectronicsédition, 1990.

K. Polgar and A. , Crystal growth and stoichiometry of LiNbO3 prepared by the flux method, Optical Materials, vol.19, issue.1, pp.7-11, 2002.
DOI : 10.1016/S0925-3467(01)00195-1

P. F. Bordui, R. G. Norwood, D. H. Jundt, and M. M. Fejer, Preparation and characterization of off???congruent lithium niobate crystals, Journal of Applied Physics, vol.26, issue.2, pp.875-879, 1992.
DOI : 10.1109/3.44926

D. H. Jundt, M. M. Fejer, and R. L. Byer, Optical properties of lithium-rich lithium niobate fabricated by vapor transport equilibration, IEEE Journal of Quantum Electronics, vol.26, issue.1, pp.135-138, 1990.
DOI : 10.1109/3.44926

M. Cochez, M. Ferriol, and P. Bourson, Influence of the dopant concentration on the OH??? absorption band in Fe-doped LiNbO3 single-crystal fibers, Optical Materials, vol.21, issue.4, pp.775-781, 2003.
DOI : 10.1016/S0925-3467(02)00098-8

URL : https://hal.archives-ouvertes.fr/hal-00322467

P. Bourson, M. Aillerie, M. Cochez, M. Ferriol, Y. Zhang et al., Characterization of iron substitution process in Fe:LiNbO3 single crystal fibers by polaron measurements, Optical Materials, vol.24, issue.1-2, pp.111-116, 2003.
DOI : 10.1016/S0925-3467(03)00113-7

URL : https://hal.archives-ouvertes.fr/hal-00322465

H. Fay, W. J. Alford, and H. M. , CRYSTALS ON MELT COMPOSITION, Applied Physics Letters, vol.80, issue.3, pp.89-92, 1968.
DOI : 10.1016/0022-3697(66)90074-6

P. Lerner, C. Legras, and J. Dumas, Stoechiom??trie des monocristaux de m??taniobate de lithium, Journal of Crystal Growth, vol.3, issue.4, pp.3-4231, 1968.
DOI : 10.1016/0022-0248(68)90139-5

G. E. Peterson, Nb NMR Linewidths in Nonstoichiometric Lithium Niobate, The Journal of Chemical Physics, vol.5, issue.10, pp.4848-4851, 1972.
DOI : 10.1063/1.1840478

S. C. Abrahams and P. Marsh, Defect structure dependence on composition in lithium niobate, Acta Crystallographica Section B Structural Science, vol.42, issue.1, pp.61-68, 1986.
DOI : 10.1107/S0108768186098567

H. Donnerberg, S. M. Tomlinson, C. R. Catlow, and O. F. Schirmer, crystals, Physical Review B, vol.51, issue.10, pp.4877-4883, 1991.
DOI : 10.1016/0022-3697(90)90173-D

N. Kumada, N. Ozawa, F. Muto, and N. Kinomura, LiNbO3 with ilmenite-type structure prepared via ion-exchange reaction, Journal of Solid State Chemistry, vol.57, issue.2, pp.267-268, 1985.
DOI : 10.1016/S0022-4596(85)80017-7

F. Abdi, M. D. Fontana, and M. Aillerie, Coexistence of Li and Nb vacancies in the defect structure of pure LiNbO3 and its relationship to optical properties, Applied Physics A, vol.92, issue.3, pp.427-434, 2006.
DOI : 10.1080/00150198908014239

URL : https://hal.archives-ouvertes.fr/hal-00322224

H. J. Levinstein, A. A. Ballman, R. T. Denton, A. Ashkin, and J. M. , Dziedzic : Reduction of the Susceptibility to Optically Induced Index Inhomogeneities in LiTaO 3 and LiNbO 3, Journal of Applied Physics, issue.8, pp.383101-3102, 1967.

O. F. Schirmer, O. Thiemann, and M. Wöhlecke, Defects in LiNbO3???I. experimental aspects, Journal of Physics and Chemistry of Solids, vol.52, issue.1, pp.185-200, 1991.
DOI : 10.1016/0022-3697(91)90064-7

J. Jackel, A. M. Glass, G. E. Peterson, C. E. Rice, D. H. Olson et al., waveguides, Journal of Applied Physics, vol.7, issue.1, pp.269-270, 1984.
DOI : 10.1063/1.94055

A. L. Dawar, S. M. Al-shukri, R. M. De-la-rue, A. C. Nutt, and G. Stewart, Fabrication and characterization of titanium indiffused proton exchanged optical waveguides in Z-cut LiNbO 3, Optics Communications, issue.2, pp.61100-104, 1987.

K. Nassau, Lithium niobate a new type of ferroelectric : Growth structure and properties, volume Ferroelectricity, 1967.

G. G. Zhong, J. Jin, and Z. K. Wu, Measurements of optically induced refractive-index damage of lithium niobate doped with different concentrations of MgO (A), Journal of the Optical Society of America, vol.70, p.631, 1980.

K. L. Sweeney, L. E. Halliburton, D. A. Bryan, R. Rice, R. Gerson et al., Point defects in Mg???doped lithium niobate, Journal of Applied Physics, vol.45, issue.4, pp.1036-1044, 1985.
DOI : 10.1063/1.95372

D. A. Bryan, R. Gerson, and H. E. Tomaschke, Increased optical damage resistance in lithium niobate, Applied Physics Letters, vol.380, issue.9, pp.847-849, 1984.
DOI : 10.1080/00150197808237350

D. A. Bryan, R. R. Rice, R. Gerson, H. E. Tomaschke, K. L. Sweeney et al., Halliburton : Magnesium-doped lithium niobate for higher optical power applications, Optical Engineering, vol.24, pp.138-143, 1985.

T. Volk and V. I. Pryalkin, Optical-damage-resistant LiNbO_3:Zn crystal, Optics Letters, vol.15, issue.18, pp.996-998, 1990.
DOI : 10.1364/OL.15.000996

M. Wöhlecke, G. Corradi, and K. Betzler, Optical methods to characterise the composition and homogeneity of lithium niobate single crystals, Applied Physics B Laser and Optics, vol.4, issue.Suppl. 26-2, pp.323-330, 1996.
DOI : 10.1080/00150199408215933

U. Schlarb, S. Klauer, M. Wesselmann, and K. Betzler, Wöhlecke : Determination of the Li/Nb ratio in lithium niobate by means of birefringence and Raman measurements

A. Ridah, P. Bourson, M. D. Fontana, and G. Malovichko, The composition dependence of the Raman spectrum and new assignment of the phonons in, Journal of Physics: Condensed Matter, vol.9, issue.44, pp.9687-9693, 1997.
DOI : 10.1088/0953-8984/9/44/022

Y. Zhang, L. Guilbert, P. Bourson, K. Polgar, and M. D. Fontana, Characterization of short-range heterogeneities in sub-congruent lithium niobate by micro-Raman spectroscopy, Journal of Physics: Condensed Matter, vol.18, issue.3, pp.957-963, 2006.
DOI : 10.1088/0953-8984/18/3/013

URL : https://hal.archives-ouvertes.fr/hal-00327248

Y. Zhang, Caractérisation spectroscopique du niobate de lithium sous forme de cristaux massifs et guides d'onde, Thèse de doctorat, 2004.

L. Software, User guide (Beta 2 version) HORIBA Group division, 2001.

. Dilor-confocal-laser-raman, volume Part 1 : Physical basis

I. R. Lewis and H. G. Edwards, Handbook of Raman spectroscopy, 20012001.

R. Loudon, The Raman effect in crystals Advances in Physics, pp.423-482, 1964.

R. H. Webb, Confocal optical microscopy, Reports on Progress in Physics, vol.59, issue.3, pp.427-471, 1996.
DOI : 10.1088/0034-4885/59/3/003

C. J. De-grauw, N. M. Sijtsema, C. Otto, and J. Greve, Axial resolution of confocal Raman microscopes: Gaussian beam theory and practice, Journal of Microscopy, vol.188, issue.03, pp.273-279, 1988.
DOI : 10.1046/j.1365-2818.1997.2620818.x

T. Wilson and A. R. Carlini, Size of the detector in confocal imaging systems, Optics Letters, vol.12, issue.4, pp.227-229, 1987.
DOI : 10.1364/OL.12.000227

W. Schrof, J. Klingler, W. Heckmann, and D. Horn, Confocal fluorescence and Raman microscopy in industrial research, Colloid & Polymer Science, vol.276, issue.7, pp.577-588, 1998.
DOI : 10.1007/s003960050284

L. Kador, T. Schittkowski, M. Bauer, and Y. Fan, Three-dimensional materials analysis by confocal Raman microspectroscopy, Applied Optics, vol.40, issue.28, pp.4965-4970, 2001.
DOI : 10.1364/AO.40.004965

R. Hammoum, S. O. Hamady, and M. D. Fontana, Generalized model for incoherent detection in confocal optical microscopy, Applied Optics, vol.49, issue.16, pp.96-105, 2010.
DOI : 10.1364/AO.49.000D96

URL : https://hal.archives-ouvertes.fr/hal-00515692

P. Török, P. D. Higdon, and T. , On the general properties of polarised light conventional and confocal microscopes, Optics Communications, vol.148, issue.4-6, pp.300-315, 1998.
DOI : 10.1016/S0030-4018(97)00576-2

B. R. Masters and M. Böhnke, Confocal microscopy of the human cornea in vivo, Progress in Retinal and Eye Research, vol.18, pp.553-628, 1999.
DOI : 10.1007/978-94-010-0322-3_3

Y. Garini, B. J. Vermolen, and I. T. , From micro to nano: recent advances in high-resolution microscopy, Current Opinion in Biotechnology, vol.16, issue.1, pp.3-12, 2005.
DOI : 10.1016/j.copbio.2005.01.003

P. Török and T. Wilson, Rigorous theory for axial resolution in confocal microscopes, Optics Communications, vol.137, issue.1-3, pp.127-135, 1997.
DOI : 10.1016/S0030-4018(96)00771-7

C. J. Sheppard, Scanned imagery, Journal of Physics D: Applied Physics, vol.19, issue.11, pp.2077-2084, 1986.
DOI : 10.1088/0022-3727/19/11/007

K. Buse, Light-induced charge transport processes in photorefractive crystals I: Models and experimental methods, Applied Physics B: Lasers and Optics, vol.64, issue.3, pp.273-291, 1997.
DOI : 10.1007/s003400050175

K. Buse, H. Hesse, U. Van-stevendaal, S. Loheide, D. Sabbert et al., Photorefractive properties of ruthenium-doped potassium niobate, Applied Physics A Solids and Surfaces, vol.9, issue.6, pp.563-567, 1994.
DOI : 10.1364/JOSAB.9.001704

J. García, M. A. Mondragón, J. M. Hernández, and J. L. Maldonado, Photocurrent determination of charge transport parameters in KNbO3:Fe3+, Optical Materials, vol.3, issue.1, pp.61-64, 1994.
DOI : 10.1016/0925-3467(94)90030-2

K. Buse, U. Van-stevendaal, R. Pankrath, and E. Krätzig, Light-induced charge transport properties of Sr_061Ba_039Nb_2O_6:Ce crystals, Journal of the Optical Society of America B, vol.13, issue.7, pp.1461-1467, 1996.
DOI : 10.1364/JOSAB.13.001461

E. Kratzig, :Fe, Ferroelectrics, vol.21, issue.1, pp.635-636, 1978.
DOI : 10.1149/1.2133226

P. Günter, Photovoltages, photocurrents and photorefractive effects in KNbO3:Fe, Ferroelectrics, vol.26, issue.1, pp.671-674, 1978.
DOI : 10.1063/1.87974

C. Medrano, E. Voit, P. Amrhein, and P. Günter, Optimization of the photorefractive properties of KNbO 3 crystals, Journal of Applied Physics, vol.63, pp.4668-4673, 1988.

V. I. Belinicher and B. I. Sturman, The photogalvanic effect in media lacking a center of symmetry, Soviet Physics Uspekhi, vol.23, issue.3, pp.199-223, 1980.
DOI : 10.1070/PU1980v023n03ABEH004703

H. G. Festl, P. Hertel, E. Krätzig, and R. Baltz, Investigations of the Photovoltaic Tensor in Doped LiNbO3, physica status solidi (b), vol.27, issue.1, pp.157-164, 1982.
DOI : 10.1080/00150198008226108

V. G. Brovkovich and B. I. , Sturman : Observation of nonequilibrium diffusion in LiNb0 3 crystals. Jounal of Experimental and Theoretical Physics Letters, pp.550-553, 1983.

S. L. Sochava, K. Buse, and E. Krätzig, Photoinduced Hall-current measurements in photorefractive sillenites, Physical Review B, vol.23, issue.7, pp.4684-4686, 1995.
DOI : 10.1109/JQE.1987.1073223

P. Nouchi, J. P. Partanen, and R. W. Hellwarth, Simple transient solutions for photoconduction and the space-charge field in a photorefractive material with shallow traps, Physical Review B, vol.16, issue.60, pp.4715581-15587, 1993.
DOI : 10.1063/1.335694

J. Feinberg, D. Heiman, A. R. Jr, and R. W. Tangay, Photorefractive effects and light???induced charge migration in barium titanate, Journal of Applied Physics, vol.48, issue.3, pp.1297-1305, 1980.
DOI : 10.1063/1.324274

T. J. Hall, R. Jaura, L. M. Connors, and P. D. Foote, The photorefractive effect???a review, Progress in Quantum Electronics, pp.77-146, 1985.
DOI : 10.1016/0079-6727(85)90001-1

J. J. Amodei, Analysis of transport processes during holographic recording in insulators, RCA Review, vol.32, pp.185-198, 1971.

V. L. Vinetskii and N. V. Kukhtarev, Theory of the conductivity induced by recording holographic gratings in non-metallic crystals. Soviet Physics -Solid State, p.2414, 1975.

H. Kurz, E. Kratzig, W. Keune, H. Engelmann, U. Gonser et al., Photorefractive centers in LiNbO 3 , studied by optical-, Mössbauer-and EPR-methods, Applied Physics A : Materials Science & Processing, vol.12, issue.4, pp.355-368, 1977.

E. Kratzig, R. Orlowski, and V. Doormann, Rosenkranz : Optical information storage in LiTaO 3 :Fe-crystals. Society of Photo-Optical Instrumentation Engineers, pp.33-37, 1978.

E. Kratzig and R. Orlowski, Reduction of optical damage effects in LiNbO3 and LiTaO3, Optical and Quantum Electronics, vol.21, issue.6, pp.495-498, 1980.
DOI : 10.1007/BF00619922

R. Orlowski and E. Kratzig, Holographic method for the determination of photo-induced electron and hole transport in electro-optic crystals, Solid State Communications, vol.27, issue.12, pp.1351-1354, 1978.
DOI : 10.1016/0038-1098(78)91570-3

F. P. Strohkendl, J. C. Jonathan, and R. W. , Hole???electron competition in photorefractive gratings, Optics Letters, vol.11, issue.5, pp.312-314, 1986.
DOI : 10.1364/OL.11.000312

G. Lesaux, G. Roosen, and A. Brun, Observation and analysis of the fast photorefractive process in BSO, Optics Communications, vol.56, issue.6, pp.374-378, 1986.
DOI : 10.1016/0030-4018(86)90374-3

G. A. Brost, R. A. Motes, and J. R. , Intensity-dependent absorption and photorefractive effects in barium titanate, Journal of the Optical Society of America B, vol.5, issue.9, pp.1879-1885, 1988.
DOI : 10.1364/JOSAB.5.001879

L. Holtmann, A model for the nonlinear photoconductivity of BaTiO3, Physica Status Solidi (a), vol.10, issue.1, p.89, 1989.
DOI : 10.1080/00150197908239450

F. Jermann and J. , Light-induced charge transport in LiNbO_3:Fe at high light intensities, Journal of the Optical Society of America B, vol.10, issue.11, pp.2085-2092, 1993.
DOI : 10.1364/JOSAB.10.002085

M. Simon, . St, K. Wevering, E. Buse, and . Kratzig, The bulk photovvoltaic effect of photorefractive LiNbO 3 :Fe crystals at high light intensities, Journal of Physics D : Applied Physics, issue.30, pp.144-149, 1997.

A. V. Postnikov and V. Caciuc, Structure optimization and frozen phonons in LiNbO3, Journal of Physics and Chemistry of Solids, vol.61, issue.2, pp.295-299, 2000.
DOI : 10.1016/S0022-3697(99)00296-6

URL : http://arxiv.org/pdf/cond-mat/9902274

R. Mouras, P. Bourson, M. D. Fontana, and G. Boulon, Raman spectroscopy as a probe of the rare-earth ions location in LiNbO 3 crystals, Optics Communications, pp.439-444, 2001.

M. Fontana, K. Chah, M. Aillerie, R. Mouras, and P. Bourson, Optical damage resistance in undoped LiNbO 3 crystals, Optical Materials, issue.16, pp.111-117, 2001.
DOI : 10.1016/s0925-3467(00)00066-5

URL : https://hal.archives-ouvertes.fr/hal-00322474

M. V. Ciampolillo, A. M. Zaltron, M. Bazzan, N. Argiolas, C. Sada et al., Iron doping of lithium niobate by thermal diffusion from thin film: study of the treatment effect, Applied Physics A, vol.12, issue.1
DOI : 10.1088/0953-8984/12/23/313

URL : https://hal.archives-ouvertes.fr/hal-00579909

F. Lhomme, P. Bourson, G. Boulon, Y. Guyot, R. Burlot-loison et al., New spectroscopic investigation of Cr 3+ centres in LiNbO 3 crystals, Journal of Luminescence, pp.83-84441, 1999.

M. G. Clark, F. J. Disalvo, A. M. Glass, and G. E. Peterson, Electronic structure and optical index damage of iron???doped lithium niobate, The Journal of Chemical Physics, vol.6, issue.12, pp.6209-6219, 1973.
DOI : 10.1088/0034-4885/31/1/305

V. Hol´yhol´y, K. Wolf, M. Kastner, H. Stanzl, and W. Gebhardt, X-ray triple-crystal diffractometry of defects in epitaxic layers, Journal of Applied Crystallography, vol.27, issue.4, pp.551-557, 1994.
DOI : 10.1107/S0021889894000208

A. Gallardo, S. Spells, R. Navarro, and H. Reinecke, Confocal Raman microscopy: how to correct depth profiles considering diffraction and refraction effects, Journal of Raman Spectroscopy, vol.57, issue.19, pp.880-884, 2007.
DOI : 10.1002/jrs.1736

L. Rebouta, P. J. Smulders, D. O. Boerma, F. Agullo-lopez, M. F. Da-silva et al., : Computer simulations, Physical Review B, vol.5, issue.121, pp.3600-3610, 1993.
DOI : 10.1016/0921-5107(91)90081-6

D. Kip, J. Hukriede, and E. Kratzig, Holographic Measurement of Dark Conductivity in LiNbO3:Ti:Fe Planar Optical Waveguides, physica status solidi (a), vol.95, issue.62, pp.3-4, 1998.
DOI : 10.1016/0030-4018(93)90044-6

I. B. Barkan, A. V. Vorob-'ev, and S. I. , Transient optical storage in lithium niobate crystal, Soviet Journal of Quantum Electronics, vol.9, issue.4, pp.492-494, 1979.
DOI : 10.1070/QE1979v009n04ABEH008916

R. S. Weis and T. K. Gaylord, Lithium niobate: Summary of physical properties and crystal structure, Applied Physics A Solids and Surfaces, vol.54, issue.4, p.191, 1985.
DOI : 10.1080/00150198408245047

. Meltzer, Optical absorption spectroscopy of Fe 2+ and Fe 3+ ions in LiNbO3, Journal of Applied Physics, vol.92, issue.12, pp.7051-7055, 2002.

M. V. Ciampolillo, M. Bazzan, C. Sada, N. Argiolas, A. Zaltron et al., Diffused Crystals, Ferroelectrics, vol.389, issue.1, pp.142-152, 2009.
DOI : 10.1364/JOSAB.23.001867

URL : https://hal.archives-ouvertes.fr/hal-00578155

A. Harhira, L. Guilbert, P. Bourson, and H. Rinnert, Decay time of polaron photoluminescence in congruent lithium niobate, physica status solidi (c), vol.78, issue.3, pp.926-929, 2007.
DOI : 10.1080/00150199508228312

URL : https://hal.archives-ouvertes.fr/hal-00327241

. Les-atomes-d, oxygène au-dessus de la base sont colorés en gris clair et ceux endessous du plan sont en gris foncé (voir l'insert en hautàhautà droite). [109], p.60

E. Lo-]-et, TO] sur unéchantillonunéchantillon de LN congruent dans la configuration Z(XX)Z (temps d'acquisition 3×30s), p.60

A. Fréquence, A 1 [TO 2 ] et A 1 [TO 4 ] ajustés depuis les données des spectres de la face X diffusée fer pris dans la configuration X(ZZ)X deséchantillonsdeséchantillons LN traités sous argon, oxydés et réduits sec et humides, ainsi que d'un cristal massif congruent, p.76

. Fréquence, A 1 [TO 2 ] et A 1 [TO 4 ] ajustés depuis les données de scan de la face latérale de quatré echantillons de LN diffusés Fe, les ´ echantillons ontétéontété préparés sous oxygène, avec une atmosphère s` eche ou humide, deux ontétéontété post-traités sous N 2 + H 2 . Dans les données deséchantillonsdeséchantillons secs les lignes sont des guides pour les yeux, Les lignes verticales en pointillés délimitent les zones dopée (0 -7 µm) et non dopée (15 -20 µm). . . . . . . . . . . . . . . . . . . . 82

A. Fréquence, A 1 [TO 2 ] et A 1 [TO 4 ] ajustés depuis les données des spectres de la face X deséchantillonsdeséchantillons dopésdopésà 0.03 et 0.05 mol% non traités, traités sous O 2 pendant 5h et 10h, traités sous N 2 , ainsi que d'un cristal massif congruent, p.90

S. Raman-d-'unéchantillonunéchantillon and L. , Fe dans la configuration X(YZ)Y donnant lieu ` a l'effet PR entre 530 et 700 cm, p.114

E. Modes, A 1 [TO] obtenus en Raman en retrodiffusion, p.132