Abstract

The optical absorption spectrum of ion-implanted silica is shown to become dichroic when it is photobleached with polarized 248-nm light. The dichroism is modeled by a photobleaching process that bleaches color centers preferentially depending on their local orientation with respect to the polarization of the photobleaching light. A similar photobleaching process may occur in photosensitive fiber, thus providing a possible explanation for the birefringence that is observed in the photoinduced index change.

© 1993 Optical Society of America

Refractive-index changes in fused silica produced by heavy-ion implantation followed by photobleaching

J. Albert, B. Malo, K. O. Hill, D. C. Johnson, J. L. Brebner, and R. Leonelli
Opt. Lett. 17(23) 1652-1654 (1992)

Dynamic and orientational behavior of UV-induced luminescence bleaching in Ge-doped silica optical fiber

Michel Poirier, Simon Thibault, Jocelyn Lauzon, and Francois Ouellette
Opt. Lett. 18(11) 870-872 (1993)

Photowritten gratings in ion-exchanged glass waveguides

J. E. Roman and K. A. Winick
Opt. Lett. 18(10) 808-810 (1993)

Erasure of thermally poled second-order nonlinearity in fused silica by electron implantation

P. G. Kazansky, A. Kamal, and P. St. J. Russell
Opt. Lett. 18(14) 1141-1143 (1993)

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W. K. Burns, J. Comas, and R. P. Moeller
Opt. Lett. 5(2) 45-47 (1980)