Optical fiber
An optical fiber includes a glass fiber and a coating resin layer with which the glass fiber is covered, wherein the coating resin layer includes tin and a cured ultraviolet curable resin composition containing 2,4,6-trimethylbenzoyldiphenyl phosphine as a photoinitiator, a percentage of uncured components having a molecular weight of 1000 or less included in the coating resin layer is 15% by mass or less, and a fraction of an amount of a phosphorus-tin complex with respect to an amount of hydrocarbon on the surface of coating resin layer is 1000 ppm or less.
1. An optical fiber comprising:
a glass fiber and a coating resin layer with which the glass fiber is covered, wherein the coating resin layer has a primary resin layer and a secondary resin layer, the primary resin layer includes a cured ultraviolet curable resin composition containing 2,4,6-trimethylbenzoyldiphenyl phosphine as a photoinitiator, and
the secondary resin layer includes tin and a cured ultraviolet curable resin composition containing 2,4,6-trimethylbenzoyldiphenyl phosphine as a photoinitiator,
the content of 2,4,6-trimethylbenzoyldiphenyl phosphine is 0.5 to 2.0% by mass in the coating resin layer,
a percentage of uncured components having a molecular weight of 1000 or less included in the coating resin layer is 15% by mass or less, and
a fraction of an amount of a phosphorus-tin complex with respect to an amount of hydrocarbon on a surface of the coating resin layer is 1000 ppm or less, and
a cured ultraviolet curable resin composition containing 25 to 45% by mass of a polyfunctional monomer having a bisphenol skeleton.
2. The optical fiber according to claim 1 , wherein
a Young's modulus of the secondary resin layer is 800 MPa or more at 23° C.
3. The optical fiber according to claim 1 , wherein
a Young's modulus of the secondary resin layer is 900 MPa or more at 23° C.
4. The optical fiber according to claim 1 , having an outer diameter of 260 μm or less.
5. The optical fiber according to claim 1 , having an outer diameter of 210 μm or less.
6. The optical fiber according to claim 2 , having an outer diameter of 260 μm or less.
7. The optical fiber according to claim 3 , having an outer diameter of 260 μm or less.
8. The optical fiber according to claim 2 , having an outer diameter of 210 μm or less.
9. The optical fiber according to claim 3 , having an outer diameter of 210 μm or less.