  We report large-mode-area solid-core photonic crystal fibers made from fused
silica that resist ultraviolet (UV) solarization even at relatively high
optical powers. Using a process of hydrogen loading and UV irradiation of the
fibers, we demonstrate stable single-mode transmission over hundreds of hours
for fiber output powers of 10 mW at 280 nm and 125 mW at 313 nm (limited only
by the available laser power). Fiber attenuation ranges from 0.9 dB/m to 0.13
dB/m at these wavelengths, and is unaffected by bending for radii above 50 mm.
