Title:
OPTICAL FIBER, METHOD FOR DESIGNING OPTICAL FIBER, AND METHOD FOR MANUFACTURING OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2022/131161
Kind Code:
A1
Abstract:
This optical fiber comprises a side core layer that surrounds the outer periphery of a core part, and a cladding part that surrounds the outer periphery of the side core layer, the expressions ∆1 > ∆Clad > ∆2 and 0 > ∆2 being true, where ∆1 is the average maximum relative refractive index difference of the core part with respect to the average refractive index of the cladding part, ∆2 is the relative refractive index difference of the average refractive index of the side core layer, and ∆Clad is the relative refractive index difference of the average refractive index of the cladding part with respect to pure quartz glass, the effective core cross-sectional area for a wavelength of 1550 nm is 100 µm2 to 160 µm2, (∆1 - ∆2) is 0.36% to 0.54%, ∆2 is -0.23% to -0.08%, b/a is 2.5-3.9, where 2a is the core diameter and 2b is the outside diameter of the side core layer, and the value of (∆1 - ∆2) is such that the cutoff wavelength is no more than 10 nm from the lowest value thereof.
Inventors:
MUKASA KAZUNORI (JP)
Application Number:
PCT/JP2021/045572
Publication Date:
June 23, 2022
Filing Date:
December 10, 2021
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
G02B6/036
Domestic Patent References:
| WO2000062106A1 | 2000-10-19 |
Foreign References:
| JP2012516473A | 2012-07-19 | |||
| JP2018533079A | 2018-11-08 | |||
| JP2011197667A | 2011-10-06 | |||
| JP2015166853A | 2015-09-24 | |||
| US20190243063A1 | 2019-08-08 | |||
| JPS40451B1 | ||||
| JPH027973B2 | 1990-02-21 | |||
| JP2003066259A | 2003-03-05 | |||
| JP2009122277A | 2009-06-04 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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