A limiting characteristic of traditional photorefractive inorganic crystals for holographic applications is erasure upon readout with a Bragg matched beam or volatility. Two-photon recording in photorefractive materials can be used for recording and nondestructive readout of holograms. Nonlinear Photonics will focus on the key issues relevant to producing a two-photon recording medium with an inorganic single Crystal host. Enhancing the excited state absDrption and decrdasing competiting effects will be accomplished by doping and post-processing. Applications for a sensitive two-photon materibl include optical computing and optical signal processing, optical neural networks add associative memories. In addition, two-photon holography should find application in reconfigurable interconnects, and narrow band filters.
Keywords: Two-Photon, Optical Filters, Excited-State, Optical Computing
