Based on the report given by J. E. Midwinter that the refractive indices n<sub>o</sub> and n<sub>e</sub> oflithium niobate doped with magnesium （MgO:LiNbo<sub>3</sub>） are lower t...Based on the report given by J. E. Midwinter that the refractive indices n<sub>o</sub> and n<sub>e</sub> oflithium niobate doped with magnesium （MgO:LiNbo<sub>3</sub>） are lower than those of LiNbO<sub>3</sub>,S.Sudo et al. achieved for the first time the core-cladding wave guide structure of LiNbO<sub>3</sub>展开更多
A core-cladding waveguide structure of lithium niobate single crystal fiber with different refractive index profiles has been obtained by using an Mg-ion indiffusion process. The propagation loss of the dadded crystal...A core-cladding waveguide structure of lithium niobate single crystal fiber with different refractive index profiles has been obtained by using an Mg-ion indiffusion process. The propagation loss of the dadded crystal fiber is measured to be 14 times as low as that of the undadded crystal fibers. Mechanisms of Mg-ion indiffusion and reasons of lattice distortion are analyzed and discussed. It is found by X-ray diffraction analysis as well as scanning electron microscopy that MgO-rich layer in the magnesium diffused surface exhibits the crystal structure of a new compound from the Li-Mg-Nb-O ternary system. It is proposed, for the first time, that this new compound in MgO-rich layer is the real source of Mg-ion indiffusion lithium niobate.展开更多
基金Project supported by the Foundation of Electronic Materials Research Laboratory,Xi'an Jiaotong University.
文摘Based on the report given by J. E. Midwinter that the refractive indices n<sub>o</sub> and n<sub>e</sub> oflithium niobate doped with magnesium （MgO:LiNbo<sub>3</sub>） are lower than those of LiNbO<sub>3</sub>,S.Sudo et al. achieved for the first time the core-cladding wave guide structure of LiNbO<sub>3</sub>
基金the Fund of Electronic Materials Research Laboratory, Xi'an Jiaotong University
文摘A core-cladding waveguide structure of lithium niobate single crystal fiber with different refractive index profiles has been obtained by using an Mg-ion indiffusion process. The propagation loss of the dadded crystal fiber is measured to be 14 times as low as that of the undadded crystal fibers. Mechanisms of Mg-ion indiffusion and reasons of lattice distortion are analyzed and discussed. It is found by X-ray diffraction analysis as well as scanning electron microscopy that MgO-rich layer in the magnesium diffused surface exhibits the crystal structure of a new compound from the Li-Mg-Nb-O ternary system. It is proposed, for the first time, that this new compound in MgO-rich layer is the real source of Mg-ion indiffusion lithium niobate.
