title: Large-area fiber-optic gyroscope on a multiplexed fiber network.
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 20 km² and coexists with Internet data traffic. This Sagnac interferometer is capable of detecting signals that are larger than 10(-8) (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.
authors.affiliation: Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Clivati
authors.forename: D
authors.initials: D
authors.lastname: Calonico
authors.forename: G A
authors.initials: GA
authors.lastname: Costanzo
authors.forename: A
authors.initials: A
authors.lastname: Mura
authors.forename: M
authors.initials: M
authors.lastname: Pizzocaro
authors.forename: F
authors.initials: F
authors.lastname: Levi