光ファイバおよびその製造方法、光ファイバ母材の製造方法

Title:

光ファイバおよびその製造方法、光ファイバ母材の製造方法

Document Type and Number:

Japanese Patent JP5735468

Kind Code:

B2

Abstract:

This optical fiber is provided with a core (31), a cladding part (32) surrounding the periphery of the core and having a dopant-added region (32a) to which a dopant is added, and a plurality of vacancies (33) provided in the cladding part parallel to the core and concentrically with the core. When the diameter of the vacancies is defined as d1, the relative refractive index differences of the dopant-added region with respect to pure quartz glass in an inside portion close to the core and an outside portion distant from the core at a boundary between the vacancies and the dopant-added region are defined as Deltarin and Deltarout, respectively, and (Deltarout - Deltarin)/d1 is defined as the percent of slope k of a refractive index profile in the dopant-added region, the vacancies are provided in a region of the dopant-added region where the percent of slope k is -0.05%/µm to 0.05%/µm. This optical fiber makes it possible to suppress positional misalignment of the vacancies.

Inventors:

Royal chaoyang
Itaru Ishida

Application Number:

JP2012192596A

Publication Date:

June 17, 2015

Filing Date:

August 31, 2012

Export Citation:

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