Hitachi Metals, Ltd.

Natsuki Kamiya

Bing Yao

Shinji Hinoshita

Tetsuya Sukegawa

Shigeto Kobayashi

Tomokazu Hiyama

The invention provides a resin-coated optical fiber, including at least: a glass optical fiber composed of a core and a clad for coating the core; a primary layer made of UV-curing resin in contact with the glass optical fiber; and a secondary layer made of the UV-curing resin disposed on an outer periphery of the primary layer, wherein the primary layer has a two-layer structure of an inner layer in contact with a surface of the clad, and an outer layer for coating the inner layer, wherein the UV-curing resin of the inner layer has a Young's modulus of 0.9 MPa or more and 3.0 MPa or less at room temperature in a film state based on JIS standard K7113, and the UV-curing resin of the outer layer has a Young's modulus of 0.1 MPa or more and 0.7 MPa or less at room temperature in a film state based on JIS standard K7113.

Growing community of inventors

Hitachi, Japan

Natsuki Kamiya