Patent ID: 7077900
Filing Date: 2006-07-18
Classification: B29C,B29D,B29L,G02B

Abstract:
1. A method of fabricating a photonic crystal fiber preform, comprising the step of: extruding a first optical material into a continuous phase, and a second optical material into a plurality of dispersed phases to axially orient the dispersed phases; wherein said first optical material and said second optical material are extruded concurrently using one extrusion die; and wherein the first optical material is selected from the group consisting of polymethyl methacrylate, a copolymer mostly consisting of methyl methacrylate, polystyrene, a copolymer mostly consisting of styrene, a copolymer of styrene with acrylonitrile, poly-4-methylpentene-1, a copolymer of ethylene with vinyl acetate, polycarbonate, polychlorostyrene, polyvinylidene chloride, polyvinyl acetate, a tertiary or quaternary copolymer consisting of methyl methacrylate and styrene, vinyltoluene or α-methylstyrene, and maleic anhydride, polydimethylsiloxane, polyacetal, polytetrafluoroethylene, polyvinylidene fluoride, polytrifluoroethylene, polyperfluoropropylene, a copolymer or a tertiary copolymer mostly consisting of fluorine, a blend of polyvinylidene fluoride with polymethyl methacrylate, a polymer mostly consisting of fluoromethacrylate defined as CH