Abstract

A ${\mathrm{Sm}}^{+2}/{\mathrm{Sm}}^{+3}$ codoped aluminosilicate glass optical fiber was fabricated by use of modified chemical-vapor deposition in conjunction with an aerosol-delivery technique. A permanent index change of $7.6\times {10}^{-5}$ was induced in the fiber by irradiation of 1 W of multiline output from an Ar-ion laser. Bleaching of a broad absorption band of ${\mathrm{Sm}}^{+2}$ in the visible range was also observed, and it is believed that photoionization of ${\mathrm{Sm}}^{+2}\to {\mathrm{Sm}}^{+3}+e$ plays an important role in the induced photorefractivity.

© 1997 Optical Society of America

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