Method of manufacture of a plastics optical fiber has an index gradient and optical fiber has an index gradient obtained by this

摘要

Production of a plastic optical fiber with a continuous refractive index gradient from center to periphery by preparing two compositions whose refractive indices vary by at least 0.005, where each composition comprises a polymer and one also includes a reactive diluent and at least one includes a photoinitiator, mixing the compositions, spinning the mixture and photo-crosslinking the mixture, comprises using a copolymer comprising fluoroethylene and vinylene carbonate units. Production of a plastic optical fiber with a continuous refractive index gradient from center to periphery by preparing two compositions whose refractive indices vary by at least 0.005, where each composition comprises a polymer and one also includes a reactive diluent and at least one includes a photoinitiator, mixing the compositions, spinning the mixture and photo-crosslinking the mixture, comprises using a transparent amorphous copolymer comprising repeat units of formula P1 and P2, where P2 is present in an amount of 30-70 mole%: X = F or Cl.