… The results provide evidence that the birefringence is mostly responsible for the excellent
photorefractive properties of our material. Contributions from higher-order phenomena cannot …

… This work leads to an optimization of the gain coefficient and diffraction efficiency in media
that exhibits a complex anisotropic response. Chapter 5 provides a description of the basic …

… of a new photorefractive material, potassium lithium tantalate … to yield high diffraction efficiency
of photorefractive gratings in … achieved, which yielded diffraction efficiencies of 75% in a …

… The concepts discussed will become useful when we talk about the diffraction properties
of gratings in photorefractive materials. The aim now is to give a simple explanation of the …

… diffraction efficiency can be defined due to the necessities of the target application of …
material. To account for absorption losses of the materials, usually external diffraction efficiencies …

… of organic photorefractive materials, especially organic photorefractive materials containing
… mixing diffraction efficiency can be explained by the photorefractive effect. This depen- …

… the diffraction efficiency and sensitivity of the material multiplied … the world, photorefractive
organic materials are now fairly well … photorefractive compound with close to 100% diffraction …

… The diffraction efficiency of the material is defined as the ratio of thediffracted power to the
incident beam power, η =I4/I3 (for equal spot sizes). A common practice has beento extract …

… photorefractivity is used to evaluate four figures of merit that can be employed to characterize
the performance of photorefractive materials… a grating with 1% diffraction efficiency, and the …

… that the diffraction efficiency of the refractive index grating written by the optical beams be
useful for applications. The diffraction efficiency 7, which is the ratio of the diffracted intensity to …