Abstract

The energy transfer between two beams (signal and reference, respectively) writing a dynamic-volume hologram in photorefractive BSO crystals is applied to the image amplification of a diffuse object. The image intensity transmitted by the crystal is amplified 10 × in the presence of the pump reference beam. The crystal is used in the drift recording mode (applied electric field, E₀ = 10 kV cm⁻¹; fringe spacing, Λ = 3 μm), and beam coupling is induced by the nonlocal response of the crystal that is due to the fringe displacement at a constant speed. We have applied this two-wave mixing configuration to a real-time optical-processing operation; the related energy transfer and stationary image amplification permit the mode pattern visualization of a vibrating structure.

© 1981 Optical Society of America