Modeling of the RIA in silica-based optical fibers: contribution of the photoionization of radiation-induced trapped states

Description

The radiation-induced attenuation in silica optical fibers is usually attributed to the formation of color centers. The RIA spectrum is then considered a composition of several characteristic optical absorption bands. We argue, based on experimental and theoretical facts, that the photoionization of radiation-induced bandgap states may also contribute to the RIA. This contribution could notably play a role in the near-infra-red range where silica fibers are frequently operated but the origin of RIA poorly resolved.

Abstract

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