Photoinduced birefringence in tellurite glasses

Tikhomirov, V. K.; Asatryan, K. E.; Gaistian, T. V.; Vallee, R.; Seddon, A. B.
May 2004
Applied Physics Letters;5/24/2004, Vol. 84 Issue 21, p4263
Academic Journal
We report on photoinduced birefringence in TeO2-based glasses on exposure to linearly polarized subbandgap light. It is shown that the influence of glass-network modifiers, such as ZnO, Na2O, BaO, and of dopant Er2O3, on the photoinduced birefringence is not substantial indicating a dominating role of the TeO2 component. Photoinduced birefringence is optically reversible and its mechanism is proposed to be due to laser-induced alignment of intrinsic anisotropic defects of tellurite glass, such as distorted TeO4 bipyramids. © 2004 American Institute of Physics.


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