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Updated: May 12, 2026

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Large-area fiber-optic gyroscope on a multiplexed fiber network.

C Clivati¹, D Calonico, G A Costanzo

¹Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy.

|April 3, 2013

Summary

A novel fiber-optic gyroscope uses the Sagnac effect on a telecom network to detect rotation. This cost-effective sensor approaches ring laser gyroscope sensitivity for seismic applications.

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Area of Science:

Optics and Photonics
Geophysics
Telecommunications Engineering

Background:

The Sagnac effect is fundamental to optical gyroscopes.
Existing fiber-optic gyroscopes often require complex setups.
Seismic monitoring demands sensitive rotation detection.

Purpose of the Study:

To demonstrate a fiber-optic gyroscope using a multiplexed telecom network.
To achieve high sensitivity without specialized lasers or optics.
To explore seismic applications for this novel sensor.

Main Methods:

Implementation of a Sagnac interferometer on a 20 km² telecom fiber loop.
Utilizing existing internet data traffic infrastructure.
Achieving a sensitivity threshold of 10⁻⁸ (rad/s)/√Hz.

Main Results:

Successful realization of a fiber-optic gyroscope on a live telecom network.
Demonstrated sensitivity comparable to ring laser gyroscopes.
Potential for coexistence with internet data traffic.

Conclusions:

A cost-effective and practical fiber-optic gyroscope is feasible using telecom infrastructure.
This technology offers new possibilities for seismic monitoring and other applications.
The sensor approaches the performance of more complex and expensive systems.