Feedback-controlled running holograms in strongly absorbing photorefractive materials

dc.contributorUniversidade Estadual de Campinas (UNICAMP)
dc.contributorUniversity of Osnabrück
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorAcad. da Força Aérea
dc.contributorNational Academy of Sciences
dc.date.accessioned2014-05-27T11:19:56Z
dc.date.available2014-05-27T11:19:56Z
dc.date.created2014-05-27T11:19:56Z
dc.date.issued2000-09-01
dc.identifierJournal of the Optical Society of America B: Optical Physics, v. 17, n. 9, p. 1517-1521, 2000.
dc.identifier0740-3224
dc.identifierhttp://hdl.handle.net/11449/66236
dc.identifier10.1364/JOSAB.17.001517
dc.identifier2-s2.0-0034402206
dc.identifier2-s2.0-0034402206.pdf
dc.description.abstractWe propose a mathematical model for the movement in absorbing materials of photorefractive holograms under feedback constraints. We use this model to analyze the speed of a fringe-locked running hologram in photorefractive sillenite crystals that usually exhibit a strong absorption effect. Fringe-locked experiments permit us to compute the quantum efficiency for the photogeneration of charge carriers in photorefractive crystals if the effect of bulk absorption and the effective value of the externally applied field are adequately taken into consideration. A Bi12TiO20 sample was measured with the 532-nm laser wavelength, and a quantum efficiency of φ = 0.37 was obtained. Disregarding absorption leads to large errors in φ. © 2000 Optical Society of America.
dc.languageeng
dc.relationJournal of the Optical Society of America B: Optical Physics
dc.relation2.048
dc.relation0,859
dc.rightsAcesso restrito
dc.sourceScopus
dc.subjectFeedback control
dc.subjectLight absorption
dc.subjectPhotorefractive materials
dc.subjectQuantum efficiency
dc.subjectPhotogeneration
dc.subjectHolograms
dc.titleFeedback-controlled running holograms in strongly absorbing photorefractive materials
dc.typeArtículos de revistas


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