Dynamics of Photorefractive Fibers

Publisher Summary This chapter introduces a laser-heated pedestal growth technology for single-crystal fiber fabrication. A phase conjugate fiber holographic construction architecture is also presented that has the advantage of minimizing the intramodal noise excitation. Angular and wavelength selectivities for photorefractive (PR) fiber hologram storage using coupled wave theory are analyzed. Because the reflection-type wavelength-multiplexed holograms offer a higher and uniform selectivity over a wider range of the construction angles, the focus is on this type of fiber holograms. Cross-talk noise between the wavelength-multiplexed channel is evaluated, and it is found that narrowing the laser linewidth lowers the cross-talk between the holographic channels. Successive recordings partially erase the previous recorded holographic gratings; therefore, the recording-erasure dynamics of the fiber hologram is evaluated. The storage dynamics of the PR fiber hologram is also demonstrated experimentally.