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FABRICATION METHOD OF GLASS PREFORM FOR OPTICAL FIBER HAVING HOLLOWNESS, AND OPTICAL FIBER HAVING HOLLOWNESS AND FABRICATION METHOD THEREREOF
FABRICATION METHOD OF GLASS PREFORM FOR OPTICAL FIBER HAVING HOLLOWNESS, AND OPTICAL FIBER HAVING HOLLOWNESS AND FABRICATION METHOD THEREREOF
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机译：光学纤维具有空心性的玻璃预制件的制造方法，光学纤维及其空心性的制造方法
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摘要
A process for producing a glass parent material for hollow fiber, in which a glass parent material for hollow fiber being of large size and low impurity content, suited to production of hollow fiber can be produced at low cost; a hollow fiber; and a process for producing the same. There is provided a process for producing a glass parent material for hollow fiber having multiple hollows made over the entire length in the axial direction thereof, characterized by depositing glass microparticles on a revolving starting member bar to thereby obtain a porous glass parent material, subsequently making multiple hollows in the axial direction from an end of the porous glass parent material, heating the porous glass parent material in an atmosphere containing chlorine or fluorine, and thereafter heating the same at a temperature suitable for transparentization of the porous glass parent material.
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