Hitachi Metals, Ltd.

Mitsumasa Zobuchi

Masao Tachikura

Tatsuo Teraoka

Yoshiyuki Hiramoto

Noribumi Shiina

Fumi Miyata

An optical fiber end processing method includes fixing two portions of an optical fiber, heating and fusing the optical fiber between the two fixed portions, to form a first heat fusion region, heating and fusing the optical fiber fixed between the two fixed portions unit while fixing the two fixed portions, moving a heat fusion unit from a side of the first heat fusion region toward a base end side of the optical fiber, and pushing a heat fusion portion of the optical fiber in a direction of shortening a length of the heat fusion portion, to form a second heat fusion region continuous to the first heat fusion region and in which the air holes of the optical fiber disappear; and removing the first heat fusion region by cutting the optical fiber within the second heat fusion region after the second heat fusion forming.

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Hitachi, Japan

Mitsumasa Zobuchi