Sumitomo Electric Industries, Limited

Deva Omalka Vayanthi Suduwa

Ken Takahashi

Makoto Itoh

Yohei Suzuki

Kentaro Takeda

Ken Manabe

Shinji Egawa

Reo Amano

An optical-fiber ribbon includes a plurality of optical-fibers, and a common covering layer. There are formed a plurality of intermittent connection portions in which a first connection portion that is formed from the common covering layer and a non-connection portion are alternately formed between the optical-fibers. There are formed a plurality of continuous connection portions in which a second connection portion that is formed from the common covering layer is continuously formed between optical-fibers. The intermittent connection portions include a central intermittent connection portion at a central portion of the optical-fiber ribbon in a width direction. The continuous connection portions include adjacent continuous connection portions. A thickness of adjacent continuous connection portion is larger than a thickness of the central intermittent connection portion and is larger than a thickness of the continuous connection portion other than the adjacent continuous connection portions.

Optical-fiber ribbon, die, and method of manufacturing optical-fiber ribbon

An optical fiber ribbon in which a plurality of optical fibers are integrated by a common coated layer includes: an intermittent connection portion in which a connection portion formed from the common coated layer and a non-connection portion including no common coated layer are alternately formed in a longitudinal direction between every predetermined number of optical fibers equal to or greater than two; and a continuous connection portion in which a connection portion formed from the common coated layer is continuously formed in a longitudinal direction between optical fibers other than the predetermined number of optical fibers equal to or greater than two. A thickness of the connection portion of the intermittent connection portion is thinner than a thickness of the continuous connection portion.

Optical fiber ribbon, die, and method of manufacturing optical fiber ribbon

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Deva Omalka Vayanthi Suduwa