Optical fiber having plastic cladding and process for preparation thereof.

摘要

A core-cladding optical fiber having a plastic cladding composed of an amorphous copolymer having a single glass transition temperature of at least 125 DEG C but lower than 140 DEG C is described. The amorphous copolymer comprises (a) units derived from a fluorodioxole represented by the formula [I]: <CHEM> wherein R and R min are fluorine or trifluoromethyl, and (b) units derived from at least one monomer selected from tetrafluoroethylene, chlorotrifluoroethylene, Rf - CF = CF2 (in which Rf is a primary fluoroalkyl group having 1 to 5 carbon atoms) and Rg - OCF = CF2 (in which Rg is a primary fluoroalkyl group having 1 to 5 carbon atoms or a primary fluoroalkyl group having 4 to 12 carbon atoms as a whole and oxygen of an ether bond).