Patent ID: 6709997
Filing Date: 2004-03-23
Classification: C03B,C03C,G02B,Y02P,Y10S

Abstract:
An optical fiber comprising a core and a clad having a refractive index lower than that of the core, the optical fiber having the characteristic that when 108 pulses of KrF excimer laser having a wavelength of 248 nm are applied to the optical fiber, as ultraviolet ray irradiation for an evaluation of ultraviolet resistance, at an output of 10 mJ/cm2 and a pulse frequency of 100 Hz, the optical fiber as measured with a sample of one meter length has a transmittance of not less than 90% of the transmittance measured prior to the irradiation in a wavelength region of ultraviolet ray from 160 nm to 300 nm.