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Modified Sagnac experiment for measuring travel-time difference between counter-propagating light beams in a uniformly moving fiber

Ruyong Wang, Yi Zheng, Aiping Yao, Dean Langley

physics.opticsarXiv:physics/0609222

Abstract

A fiber optic conveyor has been developed for investigating the travel-time difference between two counter-propagating light beams in uniformly moving fiber. Our finding is that there is a travel-time difference Deltat=2vDeltal/c2 in a fiber segment of length Deltal moving with the source and detector at a speed v, whether the segment is moving uniformly or circularly.

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