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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Twin-core fiber sensor integrated in laser cavity.

Josu Amorebieta¹, Joao Pereira², Gaizka Durana³

¹Department of Communications Engineering, University of the Basque Country UPV/EHU, 48013, Bilbao, Spain. josu.amorebieta@ehu.eus.

Scientific Reports

|July 13, 2022

Summary

This study introduces a twin-core fiber sensor system for efficient, multiplexed sensing with minimal crosstalk. The novel design enables individual sensor addressing and enhanced multipoint sensing capabilities.

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Area of Science:

Photonics and Optical Sensing
Fiber Optic Sensors
Semiconductor Optical Amplifiers

Background:

Traditional fiber optic sensing systems face challenges with spectral efficiency and multiplexing.
Minimizing crosstalk is crucial for accurate multipoint sensing applications.
Semiconductor optical amplifiers (SOAs) offer potential for integrated sensing solutions.

Purpose of the Study:

To develop and demonstrate a twin-core fiber sensor system with enhanced spectral efficiency.
To enable reliable multiplexing and low crosstalk in fiber optic sensing.
To showcase individual sensor addressing and potential for scalable multipoint sensing.

Main Methods:

Utilizing strongly coupled multicore fiber pieces as individual sensors within a laser cavity.
Incorporating a pulsed semiconductor optical amplifier (SOA) for interrogating sensors.
Employing electrical matching of SOA gating to sensor cavity roundtrip times for individual addressing.

Main Results:

Achieved improved spectral efficiency and low crosstalk in the twin-core fiber sensor system.
Demonstrated successful individual addressing of sensors based on unique cavity lengths.
Showcased the ability to distinguish sensor responses even with overlapping spectra.

Conclusions:

The developed twin-core fiber sensor system offers a promising solution for efficient, multiplexed sensing.
The individual addressing capability significantly enhances the potential for scalable multipoint sensing.
This technology presents an appealing advancement for various sensing applications requiring high spectral efficiency and multiplexing.