Dichroism in the absorption spectrum of photobleached ion-implanted silica


  • Albert, Jacques
  • Malo, B
  • Johnson, D. C.
  • Bilodeau, F.
  • Hill, K. O.
  • Brebner, J. L.
  • Kajrys, G.




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.


OSA Publishing

Peer Review: 

Published in Peer Reviewed Journal

Faculty Name: 

Faculty of Engineering and Design

Department Name: 

Department of Electronics

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