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Refractive-index gratings written by near-ultraviolet radiation

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Abstract

This is the first report, to our knowledge, of refractive-index grating side writing in 10 mol. % GeO2-doped fiber by the near-UV light of a cw Ar+ laser (333–364 nm). An induced-index magnitude as large as 1.9×10-4 at 1.7×105W/cm2 UV power density has been achieved. The observed gratings have exhibited the same temperature stability as gratings written by a KrF excimer laser (248 nm).

© 1997 Optical Society of America

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