Abstract
A large photoinduced refractive-index change (as great as ) is obtained in lead silicate glasses by irradiation with the frequency-quadrupled output of a -switched YAG laser (266 nm). An approximately exponential relationship is found between the photoinduced refractive-index change and the lead cation mole fraction over the composition range from 18.7% to 57%. The induced refractive-index change is permanent and shows no decay after heating to 360 °C during 1 h. Dispersion of the refractive-index change suggests that the photosensitivity is associated with changes in the intrinsic glass absorption edge.
© 1999 Optical Society of America
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