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
Original Manuscript: August 10, 1981
Published: December 1, 1981
J. P. Huignard and A. Marrakchi, "Two-wave mixing and energy transfer in Bi12SiO20 crystals: application to image amplification and vibration analysis," Opt. Lett. 6, 622-624 (1981)