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Opt Lett. 2009 Jun 1;34(11):1699-701.

Effective Verdet constant in a terbium-doped-core phosphate fiber.

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  • 1Laboratory for Laser Energetics, University of Rochester, 250 E. River Road, Rochester, New York 14623, USA.


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 25 wt.% terbium-doped-core phosphate fiber to be -6.2+/-0.4 rad/(Tm) at 1,053 nm, which is six times larger than silica fiber. The result agrees well with Faraday rotation theory in optical fiber.

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