Patent ID: 11927798
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC G  C | IPC C  G

Claim 6:
7. The optical fiber according to claim 4,
wherein a mode field diameter of the optical fiber at a wavelength of 1310 nm is 8.2 μm or more and 9.6 μm or less, and a cable cutoff wavelength is 1260 nm or less,
wherein an increase in loss at a wavelength of 1625 nm when the optical fiber is wound around a mandrel having a radius of 15 mm is 1.0 dB or less per 10 of winding number, and
wherein a difference between a transmission loss at a wavelength of 1550 nm when the optical fiber is wound at tensile strength of 80 g around a bobbin on which a metallic mesh material having a diameter of a longitudinal wire of 50 μm, a diameter of a lateral wire of 50 μm and a pitch of 150 μm is wound and a transmission loss at the wavelength of 1550 nm when the optical fiber is in the state of a bundle is 1.0 dB/km or less.