Title:
光ファイバ、レーザ生成装置、レーザ加工装置、及び光ファイバの製造方法
Document Type and Number:
Japanese Patent JP7090056
Kind Code:
B2
Abstract:
The present invention provides an optical fiber capable of readily outputting light having a desired optical property with a low loss. The optical fiber 1 has a center core 10, an inner ring layer 20 located outside of the center core 10 in a radial direction, an outer core 30 located outside of the inner ring layer 20 in a radial direction, and an outer ring layer 40 located outside of the outer core 30 in a radial direction. The inner ring layer 20 has a refractive index lower than a refractive index of the center core 10. The outer ring layer 40 has a refractive index lower than a refractive index of the outer core 30. A relative refractive index difference ΔCF between the center core 10 and the inner ring layer 20 in at least one location along a longitudinal direction is smaller than a relative refractive index difference ΔPF between the outer core 30 and the outer ring layer 40 located adjacently outside of the outer core 30 in the radial direction.
Inventors:
Kensuke Shima
Application Number:
JP2019163375A
Publication Date:
June 23, 2022
Filing Date:
September 06, 2019
Export Citation:
Assignee:
Fujikura Ltd.
International Classes:
G02B6/036; B23K26/00; B23K26/064; G02B6/02; H01S3/00; H01S3/10
Domestic Patent References:
| JP2013210602A | ||||
| JP2013178497A | ||||
| JP2019040131A | ||||
| JP11084150A |
Foreign References:
| US20050013571 | ||||
| WO2018063452A1 | ||||
| WO2012102138A1 |
Attorney, Agent or Firm:
Tomohiro Mori
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