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Conferences > BGPPF > 1997 > JSuE > JSuE.6
  • Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals
  • Technical Digest Series (Optica Publishing Group, 1997),
  • paper JSuE.6
  • •https://doi.org/10.1364/BGPPF.1997.JSuE.6

Permanent refractive-index changes in pure GeO2 glass slabs induced by irradiation with below-gap light.

Yuichi Watanabe, Junji Nishii, Hiroyuki Moriwaki, Genjiro Furuhashi, Hideo Hosono, and Hiroshi Kawazoe

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Abstract

Here we report on the permanent positive refractive-index changes in pure GeO2 glass slabs induced by illumination of light having the photon energy far below than the fundamental absorption edge. The mechanism for the formation of permanent refractive-index change is explained tentatively as a consequence of Kramers-Kronig principle for an additional absorption band induced in the glass via two-competitive photochemical reactions.

© 1997 Optical Society of America

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