Bragg gratings have been written in germanium-doped optical fibers that have been treated to remove the UV absorption bands associated with oxygen-deficient defects. When one is using high-intensity 193-nm light from an ArF excimer laser to fabricate the gratings, the refractive index increases and the grating transmission spectra are similar to those obtained in standard (untreated) fiber.
© 1999 Optical Society of America
(060.2290) Fiber optics and optical communications : Fiber materials
(060.2340) Fiber optics and optical communications : Fiber optics components
(160.2750) Materials : Glass and other amorphous materials
(260.7190) Physical optics : Ultraviolet
(300.1030) Spectroscopy : Absorption
J. Albert, K. O. Hill, D. C. Johnson, F. Bilodeau, S. J. Mihailov, N. F. Borrelli, and J. Amin, "Bragg gratings in defect-free germanium-doped optical fibers," Opt. Lett. 24, 1266-1268 (1999)