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Article Dans Une Revue Applied optics Année : 2011

Permanent magnets for Faraday rotators inspired by the design of the magic sphere

Résumé

Faraday polarization rotators are commonly used in laser experiments. Most Faraday materials have a nonnegligible absorption, which is a limiting factor for high power laser optical isolators or for intracavity optical diodes. By using a stronger magnetic field and a shorter length of Faraday material, one can obtain the same polarization rotation and a reduced absorption. In this paper, we describe two permanent magnet arrangements that are easy to build and produce magnetic fields up to 1.7 T , substantially more than commonly used. The field homogeneity is largely sufficient for a 30 dB isolation ratio. We finally discuss the prospects for producing even larger fields with permanent magnets
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Dates et versions

hal-00916399 , version 1 (10-12-2013)

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Gérard Trénec, William Volondat, Orphée Cugat, Jacques Vigué. Permanent magnets for Faraday rotators inspired by the design of the magic sphere. Applied optics, 2011, 50 (24), pp.4788-4797. ⟨10.1364/AO.50.004788⟩. ⟨hal-00916399⟩
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