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    • 6. 发明申请
    • METHOD OF MANUFACTURING MULTI-SEGMENTED OPTICAL FIBER AND PREFORM
    • 制造多分支光学纤维和预制件的方法
    • WO2002102730A1
    • 2002-12-27
    • PCT/US2002/013634
    • 2002-04-29
    • CORNING INCORPORATED
    • CAIN, Michael, B.DEPAOR, LiamDESOURCIE, Robert, B.FIACCO, Richard, M.GIROUX, Cynthia, B.
    • C03B37/018
    • C03B37/01869C03B37/01211C03B37/0124C03B37/01248C03B37/01807C03B37/0183C03B2201/31C03B2203/22
    • A method for manufacturing optical fiber preform and fiber. According to the method, a core cane segment is formed with a refractive index delta preferably between 0.2% and 3% that is most preferably formed by an OVD method. A sleeve is formed including at least one down-doped moat preferably having a refractive index delta between -0.1% and -1.2% and at least one up-doped ring preferably having a refractive index delta between 0.1% and 1.2%. The sleeve is formed by introducing glass precursor and dopant compounds into a cavity of a preferably silica glass tube (e.g., one of an MCVD and PCVD method). The core cane segment is inserted into the sleeve and the sleeve is collapsed onto the core cane segment to form a core-sleeve assembly. The core-sleeve assembly is again drawn into a cane and additional cladding is preferably formed thereon. Optical fiber may be drawn from the preform in a conventional draw apparatus. According to another embodiment, the method of manufacturing a multi-segment optical fiber preform comprising the steps of forming a core cane including a first up-doped portion and a down-doped portion, forming a sleeve on an inside of a tube including a second up-doped portion, inserting the core cane into the sleeve, and collapsing the sleeve around the core cane to form a cane-sleeve assembly.
    • 一种制造光纤预制棒和纤维的方法。 根据该方法,芯棒段形成的折射率差优选为0.2%至3%,最优选通过OVD方法形成。 形成套筒,其包括至少一个向下掺杂的沟槽,优选地具有介于-0.1%和-1.2%之间的折射率差和至少一个向上掺杂的环,其优选地具有在0.1%和1.2%之间的折射率Δ。 通过将玻璃前体和掺杂剂化合物引入优选石英玻璃管(例如MCVD和PCVD方法之一)的空腔中形成套筒。 芯部分插入到套筒中,并且套筒折叠到芯部段上以形成芯套组件。 芯 - 套筒组件再次被拉伸到一个手杖中,并且优选地在其上形成附加的包层。 光纤可以在传统的拉丝装置中从预成型件中拉出。 根据另一实施例,制造多段光纤预制棒的方法包括以下步骤:形成包括第一上掺杂部分和下掺杂部分的芯棒,在包括第二上部掺杂部分的管的内侧上形成套筒 将芯棒插入套筒中,并使套筒围绕芯棒塌陷以形成手杖套筒组件。