Patent ID: 11886026
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical fiber ribbon comprising:
16 or more and 48 or less optical fibers arranged in parallel; and
a connecting resin that connects adjacent optical fibers of the optical fibers, wherein an outer diameter of each of the optical fibers is 160 μm or more and 220 μm or less,
when the number of optical fibers is set to N, and a bending strain of the optical fibers is set to S, S=0.167×N/2(%) or less,
in the optical fibers, when a bending diametery is 20 mm with 1 turn, a bending loss at a wavelength of 1550 nm is 0.75 dB or less, and when the bending diameter φ is 30 mm with 10 turns, the bending loss at the wavelength of 1550 nm is 0.25 dB or less,
in the optical fibers at both ends of the optical fiber ribbon in a parallel direction, when the bending diameter φ is 15 mm with 1 turn, the bending loss at the wavelength of 1550 nm is 0.5 dB or less, and when the bending diameter φ is 20 mm with 1 turn, the bending loss at the wavelength of 1550 nm is 0.1 dB or less, and
each of the bending losses of the optical fibers at both ends of the optical fiber ribbon in the parallel direction is smaller than the bending loss of any other optical fibers.