Hitachi Cable, Inc.

Motoyoshi Nakamura

Kanako Suzuki

Masao Tachikura

Kazumasa Ohsono

Masaru Ishikawa

Yoshikazu Namekawa

Noribumi Shiina

Toshihiko Ishikawa

Kyoji Osozawa

An optical fiber that has no bubbles in the ultraviolet ray curable resin filled inside the air holes to seal the end parts thereof, an end part processing method of the optical fiber, and an end part processing apparatus of the optical fiber, are provided. In an end part processing method of an optical fiber that is comprised of a core and a cladding formed around the core, the cladding having a refraction index lower than that of the core and has a plurality of air holes formed therein along the axis of the core, wherein the end part process of the optical fiber is to form sealed portions on the ends of the air holes by sealing them with ultraviolet ray curable resin, the method is characterized in that the sealed portion is formed by heating the end of the optical fiber.

Optical fiber, end part processing method of optical fiber, and end part processing apparatus of optical fiber

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Hitachi, Japan

Motoyoshi Nakamura