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Shift and speckle multiplexing of photorefractive holograms with optical fiber and tapered fiber

Optical fiber and fiber taper are used for reference waves in writing and reading volume holograms. The object wave interferes with the speckle pattern reference wave coming from fiber tip in the holographic medium to make a volume hologram. The spatial selectivity of the volume hologram is improved by the proposed scheme. Both experimental results and theoretical analysis are discussed.