Modified Sagnac Experiment of Measuring Travel-Time Difference between Counter-Propagating Light Beams in a Uniformly Moving Fiber

(This article was published in Physics Letters A, Volume 312, Number 1-2, June 2, 2003, pp. 7-10. Copyright 2003, with permission from Elsevier Science)

Ruyong Wang , Yi Zheng, Aiping Yao, Dean Langley

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 delta t = 2vL/c^2 in a fiber segment of length L moving with the source and detector at a speed v, whether the segment is moving uniformly or circularly.

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