US 12,222,575 B2
Intermittently connected optical fiber ribbon
Yoshie Murakoshi, Chiba (JP); Akira Namazue, Sakura (JP); and Ken Osato, Sakura (JP)
Assigned to Fujikura Ltd., Tokyo (JP)
Filed by Fujikura Ltd., Tokyo (JP)
Filed on Dec. 27, 2023, as Appl. No. 18/397,026.
Application 18/397,026 is a continuation of application No. 17/632,681, granted, now 11,899,266, previously published as PCT/JP2020/018938, filed on May 12, 2020.
Claims priority of application No. 2019-151467 (JP), filed on Aug. 21, 2019.
Prior Publication US 2024/0134140 A1, Apr. 25, 2024
Prior Publication US 2024/0231029 A9, Jul. 11, 2024
Int. Cl. G02B 6/44 (2006.01)
CPC G02B 6/448 (2013.01) [G02B 6/4403 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical fiber ribbon, comprising:
optical fibers disposed side by side in a predetermined direction; and
connecting portions that connect two adjacent ones of the optical fibers, wherein
a peripheral resin portion is formed on a periphery of the optical fibers,
an arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 μm or lower,
a ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 μm or lower, and
the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower when the connecting portions of the optical fiber ribbon are broken to separate the optical fibers and thereafter the surface of the peripheral resin portion is measured along a longitudinal direction of the optical fibers so as to prevent the broken portions of the connecting portions from being measured portions.