Abstract

A core-cladding waveguide structure for the a-axis Nd:MgO: LiNbO3 single crystal fiber with parabolic refractive index profiles was achieved by a Mg-ion indiffusion process. Propagation loss coefficient of the cladded crystal fiber was measured and is 7 times lower than the uncladded crystal fibers. Transmission modes of the 60μmlm × 45μmlm cladded crystal fiber were observed and the low order modes propagation was obtained

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