Generalized Sagnac Effect

Details Generalized Sagnac Effect Generalized Sagnac Effect

2006-09-26

arxiv.org/abs/physics/0609235v1

Physical Review Letters 93, 143901 (2004)

Physics

Optics

3 pages (including 3 figures)

Scientific paper

10.1103/PhysRevLett.93.143901

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.

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