| 摘要 |
A method for manufacturing an optical fiber preform that can produce an optical fiber having desired characteristics over the longer length thereof. A crude preform provided with a core region and a cladding region is prepared (Step S 1 ), and at a plurality of positions in the longitudinal direction of the crude preform, a refractive index profile in the cross-section of the crude preform is measured (Step S 2 ). Then, the shape of the cladding region is demarcated based on the shape of the profile (Step S 3 ). Subsequently, the crude preform is ground based on the results of the demarcation (Step S 4 ). Thus, an optical fiber preform that enables the manufacture of an optical fiber having target characteristics is manufactured. |
