METHOD FOR FABRICATING OPTICAL FIBER OR OPTICAL DEVICE DOPED WITH REDUCED METAL ION AND/OR RARE EART

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The present invention refers to with reduced metal ion and/or rare earth ion-doped optical fiber by as manufacturing method or optical device, for fabricating optical fiber or optical device substrate for sintered part on step for forming a microstructures; reducing agent microstructure including metal ion and/or rare earth ion doping solution impregnated step of agitating the mixed hot metal; metal ion and/or rare earth ion drying the impregnated microstructure; of dried is heated to be sintered fine structures including the, with reduced metal ion and/or rare earth ion-doped optical fiber by manufacturing method or optical device.