Strong grating formation in pure silica-core fibers by use of 193-nm ArF-laser radiation is reported. Unsaturated refractive-index changes of Δn~0.3×10-3 were observed in nontreated fiber, and changes of Δn~0.5×10-3 were observed in fibers with a high hydroxyl concentration. Possible mechanisms of photosensitivity in pure silica-core fibers are discussed.
© 2002 Optical Society of America
Jacques Albert*, Michael Fokine, and Walter Margulis, "Grating formation in pure silica-core fibers," Opt. Lett. 27, 809-811 (2002)