Abstract

Fiber gratings have become very attractive as wavelength-selective components in optical-fiber systems because of ease of manufacture and use. UV-written Bragg gratings in germanosilicate fibers have been extensively studied by various authors.¹ After our first report on UV-induced photosensitivity in germaniumfree Ce³⁺ -doped fibers,² Broer et al. demonstrated a Bragg grating of 17% reflectivity with 30-min exposure at 292 nm.³ Here we report Bragg gratings written in Ce³⁺ -doped fibers by a single pulse from a KrF excimer laser (Lambda Physik Model EMG 150 MSC) and also demonstrate that Ce³⁺-doped fiber gratings are comparable to those in germanosilicate fibers in terms of both strength and stability.

© 1993 Optical Society of America