We report on grating writing in air–silica structured optical fibers with pure silica cores by use of two-photon absorption at 193 nm. A decrease in propagation loss with irradiation was observed. The characteristic growth curves were obtained.
© 2003 Optical Society of America
N. Groothoff, J. Canning, E. Buckley, K. Lyttikainen, and J. Zagari, "Bragg gratings in air-silica structured fibers," Opt. Lett. 28, 233-235 (2003)