Abstract

The concept of an effective Verdet constant is proposed and experimentally validated. The effective Verdet constant of light propagation in a fiber includes contributions from the materials in both the core and the cladding. It is measured in a 25wt.% terbium-doped-core phosphate fiber to be 6.2±0.4rad(Tm) at 1053nm, which is six times larger than silica fiber. The result agrees well with Faraday rotation theory in optical fiber.

© 2009 Optical Society of America

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