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    • 10. 发明申请
    • METHODS OF MANUFACTURING WIDE-BAND MULTI-MODE OPTICAL FIBERS AND CORE PREFORMS FOR THE SAME
    • 制造宽带多模光纤的方法和相同的核心部件
    • WO2017218780A1
    • 2017-12-21
    • PCT/US2017/037686
    • 2017-06-15
    • CORNING INCORPORATED
    • BOOKBINDER, Dana CraigLI, Ming-JunTANDON, Pushkar
    • C03B37/014
    • A method of making a multi-mode optical fiber that includes: depositing a porous germania-doped silica soot to form a germania-doped porous soot preform; optionally depositing a porous silica layer over the porous soot preform; doping the porous soot preform and the optional porous silica layer with a fluorine dopant to form a co-doped soot preform having a core region and a fluorine-doped (optionally trench) region; consolidating the co-doped soot preform to form a sintered glass, co-doped core preform having a refractive index alpha profile between 1.9 and 2.2 measured at 850 nm; depositing a cladding comprising silica over the sintered glass, co-doped preform to form a multi-mode optical fiber preform; drawing the optical fiber preform into a multi-mode optical fiber. A fluorine doping parameter is adjusted taking into account the doping temperature, preferably at least 1250°C, the fluorine dopant partial pressure and the radial thickness of the soot preform.
    • 一种制造多模光纤的方法,包括:沉积掺杂多孔氧化锗的二氧化硅烟灰以形成掺杂氧化锗的多孔烟灰预制件; 任选地将多孔二氧化硅层沉积在多孔烟灰预制件上; 用氟掺杂剂掺杂多孔烟灰预制棒和任选的多孔氧化硅层以形成具有芯区和氟掺杂(任选的沟槽)区的共掺杂烟灰预制棒; 巩固所述共掺杂烟灰预制件以形成烧结玻璃,共掺杂纤芯预制件,所述共掺杂纤芯预制件具有在850nm处测量的1.9与2.2之间的折射率α分布; 在所述烧结玻璃上沉积包含二氧化硅的包覆层,共掺杂预制件以形成多模光纤预制件; 将光纤预制棒拉成多模光纤。 考虑到掺杂温度,优选至少1250℃,氟掺杂剂分压和烟灰预制棒的径向厚度来调整氟掺杂参数。