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arXiv:physics/0609235physics.optics

Generalized Sagnac Effect

Ruyong Wang, Yi Zheng, Aiping Yao

Abstract

Experiments were conducted to study light propagation in a light waveguide loop consisting of linearly and circularly moving segments. We found that any segment of the loop contributes to the total phase difference between two counterpropagating light beams in the loop. The contribution is proportional to a product of the moving velocity v and the projection of the segment length Deltal on the moving direction, Deltaphi=4pivDeltal/clambda. It is independent of the type of motion and the refractive index of waveguides. The finding includes the Sagnac effect of rotation as a special case and suggests a new fiber optic sensor for measuring linear motion with nanoscale sensitivity.

arXiv comments
3 pages (including 3 figures)
Journal reference
Physical Review Letters 93, 143901 (2004)
DOI
doi:10.1103/PhysRevLett.93.143901
Subjects
physics.opticsOptics physics.gen-phGeneral Physics

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