B. Chapitre, Effet photoréfractif et auto-focalisation : état de l'arl Références du chapitre B

P. Yeh, Physics Today, vol.47, issue.1, 1993.
DOI : 10.1063/1.2808370

J. P. Giinter, I. >. Huignard, S. Verlag, P. Gùnter, J. P. Huignard et al., Laser-induced transient gratings in LiNbO3:Fe >, Optical materials < Time resolved investigation of transient photorefractive gratings in KNbO3 >> Erasure rate and coasting in photorefractive baryum titanate at high optical power > Picosecond photorefractive and free carrier transient energy transfer in GaAs at a 1 upsilon m )) 988) t10] GC. Valley, < Short pulse gating formation in photorefractive materials ) [12] Mao Hongwei, Li. Fuming, Deng Ximing, < Transient picosecond response of the photorefarctive effect in InP:Fe >, Optics Letters < Laser-induced grating spectroscopy of cdTe > Smandek, < Picosecond photorefractive diffraction in CdTe, at I mu m >, Applied Physics A, Solids and surfaces Valley, < Photorefractive nonlinearities caused by the Dember space-charge field in undoped CdTe >, Opt. Letters Brun, < Observation and analysis of the fast photorefractive process in BSO >, Optics Comm < Transient photocurrent induced by nanosecond light pulses in < Nanosecond light energy transfer in Bi12SiO2 s at 532 run )), Optics Comm Photorefractive material response to short pulse illuminations > < Transient response of a photorefractive grating produced in a BSO crystal by a short light pulse >, Optics Comm << Transient response of photorefractive bismuth silicon oxide in the pulsed regime >, Optics Comm Solimar, < Transient energy transfer during hologram formation in photorefractive crystals > Solimar, < Transient effects dwing dynamic hologram formation in BSO crystals : theory and experiments ) (1e88) 126l L. Disdier, G. Roosen, << Nanosecond four-wave mixing in semi-insulating GaAs >, Opt < Transport processes of photoinduced carriers in BirzSiOzo > << Observation of selÊ trapping of anopticalbeamdueto the photorefractive effect>, Photorefractive materials and their applications II > Optically Induced Refractive lndex Inhomogeneities in LNbO3 and LiTaO3 > GaAs:EL2 and CdTe:V : Physique du traitement des faisceaux lumineux et des images >> Nanosecond four wave mixing and holography in BSO crystals >, Applied Optics23] DC. Jones, L. Solymar Spatial solitons in photorefractive media > Self-trapping of optical beams in photorefractive media > Stability of photorefractive spatial solitons >31] D.N.Cristodoulides, M.I.Carvalho, < Compression, self-bending, and collapse Gaussien beams in photorefractive crystals > Dimensionality and size of photorefractive spatial solitons >Vysloukh, < Spatial solitons in photorefractive Bir2TiO2g with drift mechanisms of nonlinearity >Shih, M.Segev, G.C.Valley, G.Salamo, B.Crosignani, P.Di Porto, < Observation of two-dimensionnal steady-state screening soliton >36] M.T.Taya, M.C.Bashaw, M.Segev, G.C.Valley, < Observation of dark photovoltaic spatial solitons >Zozulya, D.Z.Anderson, < Nonstationnary self-focusing in photorefractive media >38] N.Fressengeas, J.Maufoy, G.Kugel, < Temporal behavior of photorefractive bright spatial solitons >, Phys. Rev. E, 54, pp.72-74, 1966.

E. Chapitre, Etude expérimentale de l'auto-focalisation en régime nanoseconde : résultats P.=0o pour différentes tensions appliquées. La figure 14 présente le même type de mesures pour un col d'entrée we=30 pm, p.4

, de diffraction pendant la durée de I'impulsion pour une tension appliquée de 2500 V; u passe : -d'une valew a-2,84 à une valeur a=2,6 à ty=1n/2 et d:2,1 à tftp, ce qui correspond à des variations relatives respectives de 10% et25%o (fig'13e) -d'une valeur a, Les figures 13e et 14e présentent l'évolution du coefficient, p.Tp

, Nous pouvons en déduire que pour une même densité d'énergie maximale à I'entrée du cristal, le phénomène d'auto-focalisation est plus important pour des valeurs du col d'entrée plus grandes

N. Fressengeas, Thèse de doctorat de l'université de Metz, < Etude expérimentale et théorique de I'auto-focalisation d'un faisceau laser en miiieu photoréfractif : convergences spatiale et temporelle vers un soliton >

P. A. Marquez-aguilar, J. J. Sanchez-mondragon, S. Stepanov, and V. Vysloukh, < Transient self-bending of laser beams in photorefractive crystals with drift nonlinearity >, Phys. Rev. A, vol.54, pp.4-2563, 1996.

C. Provided, B. D. Rytz, . Fee, and . Struthstrasse, Germany Chapitre F : Analyse comparative des résultats expérimentaztx et du modèle théoriqtte Références du chapitre

]. G. Ii, < Nonlinear fiber optics >, 1989.

M. Cronin-golomb, Whole beam method for photorefractive non-linear optic >,Opt, Comm, vol.89, p.276, 1992.

G. , L. Saux, G. Roosen, A. Brun, T. Okamoto et al., < Transient response of a photorefractive grating produced in a BSO crystal by a short light pulse >, Optics Comm Valley, < Short pulse grating formation in photorefractive materiais Revue Phys, IEE, Journ. Quantum Electronics, QE-19 Effet photoréfractif dans les cristaux de BSO ou de BGO )Vysloukh, < Transient self-bending of laser beams in photorefractive crystals with drift non linearity >, pp.3743721-3743723, 1983.

M. Segev, B. Crosignani, P. Di-porto, G. C. Duree, G. Salamo et al., Propagation of an optical beam in a photorefractive medium in the presence of a photogalvanic nonlinearity or an extemally applied electric fieid > [12] N. Fressengeas, thèse de doctorat de l'université de Metz, < Etude expérimentale et théorique de l'auto-focalisation d'un faisceau laser en milieu photoréfractif : convergences spatiale et temporelle vers un soliton > (1997) [13] F. Wachss, L. Hesselink, << Measurement of the electrogyratory and electro-optics effects in < Measurement of electro-optic and electrogyratory effects in Bi12TiO2e ) Brun, < Photorefractive material response to short pulse illuminations >, iEEE Joumal of quantum electronics, <Nonstationnary self-focusing in photorefractive media > Time-resolved experimental analysis of a single laser pulse self-focusing in photorefractive Bi12TiO26 )), soumis à, Nanosecond light energy transfer in Bi12SiO2 e at 532 nrn )), Optics Comm Temporal behavior of photorefractive bright spatial solitons > Shih, G.C. Valley, <Photorefractive screening solitons of high and low intensity >> l23l S. Riehemann, F. Rickermann, V.V. Volkov, < Optical and photorefractive characterization of BTO crystals doped with Cd, Ca, Ga, and V >, pp.12962891520-224, 1983.

F. Chapitre, Analyse comparative des résultats expérimentattx et du modèle théorique Application numérique

T. Nous-pouvons-calculer-l-'échauffement,

, ÂT:T(0) -T o: (a.P) I (2n) Notons que l'échauffement est

A. ,