Abstract

We describe a fiber-optic gyroscope based on the Sagnac effect, realized on a multiplexed telecom fiber network. Our loop encloses an area of 20km2 and coexists with Internet data traffic. This Sagnac interferometer is capable of detecting signals that are larger than 108(rad/s)/Hz, thus approaching ring laser gyroscopes without using a narrow-linewidth laser or sophisticated optics. The proposed gyroscope could be useful for seismic applications, opening new possibilities for this kind of optical fiber sensor.

© 2013 Optical Society of America

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