Patent ID: 11860407
Assignee: FURUKAWA ELECTRIC CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical fiber comprising:
a core made of silica-based glass;
a cladding configured to cover an outer circumference of the core and made of silica-based glass having a refractive index smaller than a maximum refractive index of the core; and
a coating configured to cover an outer circumference of the cladding, the coating being made of UV curing resin, wherein:
the cladding to be covered by the coating has an outer diameter of 120 μm or smaller,
a mode field diameter at a wavelength of 1310 nm is 8.6 μm to 9.2 μm,
an effective cut-off wavelength is 1260 μm or smaller,
a bending loss at a wavelength of 1550 nm in a case of bending at a diameter of 20 mm is 0.75 dB/turn or smaller,
the core has a relative refractive index difference Δ1 of 0.37% to 0.4%, and
the optical fiber including the coating that is made of the UV curing resin has an outer diameter of 210 μm or smaller.