US 12,292,610 B2
Optical fiber cable
Tetsuya Yasutomi, Tokyo (JP)
Assigned to FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed by FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed on Aug. 2, 2022, as Appl. No. 17/878,971.
Application 17/878,971 is a continuation of application No. PCT/JP2021/008929, filed on Mar. 8, 2021.
Claims priority of application No. 2020-057479 (JP), filed on Mar. 27, 2020.
Prior Publication US 2022/0373753 A1, Nov. 24, 2022
Int. Cl. G02B 6/44 (2006.01); H01B 11/02 (2006.01)
CPC G02B 6/4403 (2013.01) [G02B 6/4413 (2013.01); G02B 6/443 (2013.01); H01B 11/02 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An optical fiber cable comprising:
a core that is formed by twisting together a plurality of optical fiber units without back-twisting; and
a sheath that is provided on an outer periphery of the core, wherein
each of the plurality of optical fiber units is formed by twisting together a plurality of intermittently-fixed optical fiber ribbons; and
a revolution direction in which the plurality of intermittently-fixed optical fiber ribbons are twisted together is the same as a revolution direction in which the plurality of optical fiber units are twisted together;
wherein a twisting pitch of the plurality of intermittently-fixed optical fiber ribbons is no more than a twisting pitch of the plurality of optical fiber units.