Title:
OPTICAL FIBER AND METHOD FOR PRODUCING OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2018/025896
Kind Code:
A1
Abstract:
Disclosed is an optical fiber in which a primary cover layer and a secondary cover layer are formed on an outer circumference of a bare optical fiber made of a core and a cladding, wherein: the Young's modulus of the primary cover layer is from 0.1 to 1.0 MPa; a relationship between the lateral rigidity D and the flexural rigidity H of the optical fiber as expressed by the formulas satisfies D/H2 ≤ 3×1017N-1m-6; the primary cover layer includes from 0.3 to 2.0 wt% of a photoinitiator including phosphorus; and the primary cover layer includes polypropylene glycol having a weight-average molecular weight from 1000 to 5000. In the formulas, r represents the radius (m), E represents the Young's modulus (Pa), the subscript g represents glass (the bare optical fiber), the subscript p represents the primary cover layer, and the subscript s represents the secondary cover layer.
Inventors:
ENOMOTO TADASHI (JP)
FUJII TAKASHI (JP)
HATTORI TOMOYUKI (JP)
SOHMA KAZUYUKI (JP)
FUJII TAKASHI (JP)
HATTORI TOMOYUKI (JP)
SOHMA KAZUYUKI (JP)
Application Number:
PCT/JP2017/027984
Publication Date:
February 08, 2018
Filing Date:
August 02, 2017
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C03C25/24; G02B6/036; G02B6/44
Domestic Patent References:
| WO2016088801A1 | 2016-06-09 |
Foreign References:
| JP2015096924A | 2015-05-21 | |||
| JP2014234317A | 2014-12-15 | |||
| JP2012136426A | 2012-07-19 |
Attorney, Agent or Firm:
SHIN-EI PATENT FIRM, P.C. (JP)
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