A Large Area Fiber Optic Gyroscope on multiplexed fiber network

TL;DR

This paper presents a fiber optic gyroscope built on a multiplexed telecom fiber network with a large enclosed area, achieving high sensitivity suitable for seismic applications without complex optics.

Contribution

It introduces a large-area fiber optic gyroscope on a multiplexed fiber network, demonstrating high sensitivity and coexistence with internet data traffic.

Findings

Achieves a sensitivity of about 1e-8 (rad/s)/sqrt(Hz)

Encloses an area of 20 km^2

Operates alongside internet data traffic

Abstract

We describe a fiber optical gyroscope based on the Sagnac effect realized on a multiplexed telecom fiber network. Our loop encloses an area of 20 km^2 and coexists with Internet data traffic. This Sagnac interferometer achieves a sensitivity of about 1e-8 (rad/s)/sqrt(Hz), thus approaching ring laser gyroscopes without using narrow-linewidth laser nor sophisticated optics. The proposed gyroscope is sensitive enough for seismic applications, opening new possibilities for this kind of optical fiber sensors