Fiber optics

Role of point defects in the photosensitivity of hydrogen-loaded phosphosilicate glass

Yu. V. Larionov

Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow

Abstract: It is shown that point defect modifications in hydrogen-loaded phosphosilicate glass (PSG) do not play a central role in determining its photosensitivity. Photochemical reactions that involve a two-step point defect modification and pre-exposure effect are incapable of accounting for photoinduced refractive index changes. It seems likely that a key role in UV-induced refractive index modifications is played by structural changes in the PSG network. Experimental data are presented that demonstrate intricate network rearrangement dynamics during UV exposure of PSG.

PACS: 42.81.-i, 42.71.Nq, 42.79.Dj

Received: 12.08.2009
Revised: 22.12.2009

 English version: Quantum Electronics, 2010, 40:5, 441–445

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