COATED OPTICAL FIBERS

摘要

The present invention provides a coated optical fiber having a primary coating and a secondary coating, wherein the primary coating has good microbending resistance and is obtained by curing a composition having high cure speed. In one embodiment, the present invention provides a coated optical fiber comprising: (i) an optical fiber; (ii) a primary coating; and (iii) a secondary coating; wherein (a) said-coated optical fiber has an attenuation increase of less than 0.650 dB/km at 1550nm; (b) said primary coating has a modulus retention ratio after hydrolytic aging of at least 0.5 and/or a glass transition temperature below -35°C; and (c) said primary coating is obtained by curing a primary coating composition having a cure dose to attain 95% of the maximum attainable modulus of less than 0.65 J/cm<2>.