%0 Journal Article %T Self-pumped phase conjugation in a ring cavity at 1.06 µm in cw and nanosecond regimes using photorefractive BaTiO3:Rh %+ Laboratoire Charles Fabry de l'Institut d'Optique / Manolia %+ FEE %A Huot, Nicolas %A Jonathan, Jean-Michel %A Rytz, Daniel %A Roosen, Gérald %< avec comité de lecture %@ 0030-4018 %J Optics Communications %I Elsevier %V 140 %P 296-298 %8 1997 %D 1997 %Z Physics [physics]/Physics [physics]/Optics [physics.optics]Journal articles %X We present self-pumped phase conjugation experiments in a ring cavity at 1.06 pm in a BaTiO,:Rh crystal both in the cw and in the nanosecond regime. The measured reflectivities are respectively 50% and 66%. At 4 W cme2 of cw illumination, it only takes 90 s to reach the steady state. A preliminary experiment of correction of the focusing effect of a lens is reported. %G English %L ujm-00118154 %U https://ujm.hal.science/ujm-00118154 %~ UNIV-ST-ETIENNE %~ IOGS %~ CNRS %~ UNIV-PSUD %~ PARISTECH %~ LCFIO %~ LCF_MANOLIA %~ UNIV-PARIS-SACLAY %~ UNIV-PSUD-SACLAY %~ UDL %~ TEST3-HALCNRS