Topic
Organic photorefractive materials
About: Organic photorefractive materials is a research topic. Over the lifetime, 697 publications have been published within this topic receiving 13041 citations.
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27 Jun 1999
TL;DR: In this article, the temporal properties of light-induced erasure decay and dark decay of reduced BaTiO3:Rh were investigated as a function of temperature, and the authors showed that the decay rate of light and dark erasure decays with temperature.
Abstract: The temporal properties of the light-induced erasure decay and dark decay of asgrown and reduced BaTiO3:Rh are investigated as a function of temperature.
1 citations
24 Apr 2008
TL;DR: In this article, light intensity effects on recording photorefractive gratings have been studied in α-phase proton exchanged LiNbO3 guides, showing a behavior quite similar to that observed with a single beam (non holographic) configuration.
Abstract: Light intensity effects on recording photorefractive gratings have been studied in α‐phase proton exchanged LiNbO3 guides. The saturating refractive index change increases as a function of the recording intensity and reaches an unstable region above a certain intensity threshold. The threshold value increases with the exchange time used for preparing the guides, showing a behavior quite similar to that observed with a single beam (non holographic) configuration. Dark decay measurements indicate that dark conductivity can be disregarded with regard to photoconductivity.
1 citations
14 Jan 1995
TL;DR: In this paper, the authors studied the potential applications of nonlinear optical phenomena in photorefractive materials in various geometries (such as waveguides, fibers, and bulks) for efficient and fault-tolerant laser-to-fiber coupling.
Abstract: : The purpose of this contract to study the potential applications of nonlinear optical phenomena in photorefractive materials in various geometries (such as waveguides, fibers, and bulks) for efficient and fault-tolerant laser-to-fiber coupling The study focuses on the development of new application concepts, theoretical modeling and experimental demonstration/characterization of novel devices based on energy coupling among different optical modes via dynamic holograms in c-axis photorefractive waveguides and fibers; and on optical resonators incorporating photorefractive dynamic holograms in bulk crystals The holograms are self-generated by the interaction of various optical modes (waves) propagating through the photorefractive material The final objective is to identify an optimum material and configuration and to demonstrate a higher coupling efficiency and better fault-tolerance in coupling light from a laser to an optical fiber or waveguide than that achievable by the conventional method (AN)
1 citations
TL;DR: Self-channeling of light waves in a rotated cut of crystals of the 4mm and the 6mm classes, whose dominant mechanism is photorefractive diffusion nonlinearity is studied.
Abstract: We study self-channeling of light waves in a rotated cut of crystals of the 4mm and the 6mm classes, whose dominant mechanism is photorefractive diffusion nonlinearity. The existence of photorefractive line waves that can be guided along the edge of the crystal is suggested and analyzed.
1 citations
TL;DR: In this article, a theoretical investigation of temperature effects on one-dimensional modulation instability of broad optical beams in photorefractive crystals is presented. But the results are limited to non-centrosymmetric and non-centerward symmetric crystals.
Abstract: We provide a theoretical investigation of temperature effects on one-dimensional modulation instability of broad optical beams in photorefractive crystals. Those physical factors related to the temperature effect, i.e., the dielectric constant, diffusion process and the dark irradiance, are considered. Our results show that, for non-centrosymmetric crystals, the dark irradiance dominates the temperature dependence of modulation instability; however, the dielectric constant temperature-dependence dominates the process in centrosymmetric photorefractive crystals. Relevant examples are provided.
1 citations