Patent ID: 6222972
Filing Date: 2001-04-24
Classification: G02B

Abstract:
A wide-band plastic-clad optical fiber comprising a quartz core and a polymer clad tightly formed around the core, which is characterized in that the clad has a multi-layered structure of a plurality of different polymers formed from polymer precursor compositions consisting essentially of monomers of fluoroalkyl containing (meth)acrylates and monofunctional or poly functional comonomers of alkyl-containing (meth)acrylates, and the refractive index of the core (n.sub.CO), that of the first clad (n.sub.CL1) as tightly formed around the core and that of the second clad (n.sub.CL2) as tightly formed over the first clad satisfy both 0.21.ltoreq.(n.sub.CO.sup.2 -n.sub.CL1.sup.2).ltoreq.0.35 and n.sub.CL2 <n.sub.CL1, wherein both the first and second clads are of UV-cured resins having a Shore hardness of not less than D60.