Title:
OPTICAL FIBER AND OPTICAL FIBER BASE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/286608
Kind Code:
A1
Abstract:
This optical fiber comprises a silica-based glass. The optical fiber has a core and a cladding circumscribing the core. The refractive index of the core is greater than the refractive index of the cladding. The core has a first core including a central axis and a second core circumscribing the first core. The average mass fraction of chlorine in the first core is lower than the average mass fraction of chlorine in the second core. The average mass fraction of fluorine in the first core is higher than the average mass fraction of fluorine in the second core. The sum of the average mass fraction of chlorine and the average mass fraction of fluorine in the second core is at most 5,000 ppm. The core contains an alkali metal element and/or an alkaline earth metal element.
Inventors:
SAKUMA HIROTAKA (JP)
KAWAGUCHI YUKI (JP)
SATO SHIN (JP)
KAWAGUCHI YUKI (JP)
SATO SHIN (JP)
Application Number:
PCT/JP2022/025961
Publication Date:
January 19, 2023
Filing Date:
June 29, 2022
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G02B6/036; C03C13/04; G02B6/02
Foreign References:
| JP2007504080A | 2007-03-01 | |||
| JP2009541796A | 2009-11-26 | |||
| US20140241684A1 | 2014-08-28 | |||
| JP2021117840A | 2021-08-10 | |||
| JP2009541796A | 2009-11-26 | |||
| JP2017076053A | 2017-04-20 | |||
| JP2019191297A | 2019-10-31 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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