Twisted Electromagnetic Modes and Sagnac Ring-Lasers

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A new approximation scheme, designed to solve the covariant Maxwell equations inside a rotating hollow slender conducting cavity (modelling a ring-laser), is constructed. It is shown that for well-defined conditions there exist TE and TM modes with respect to the longitudinal axis of the cavity. A twisted mode spectrum is found to depend on the integrated Frenet torsion of the cavity and this in turn may affect the Sagnac beat frequency induced by a non-zero rotation of the cavity. The analysis is motivated by attempts to use ring-lasers to measure terrestrial gravito-magnetism or the Lense-Thirring effect produced by the rotation of the Earth.
LaTeX 31 pages, 3 Figures

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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/35099

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/0411037
 http://arxiv.org/abs/gr-qc/0411037
 Class.Quant.Grav. 22 (2005) 909-931
 doi:10.1088/0264-9381/22/6/001

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arXiv