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Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
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Coupled-core fiber Bragg gratings for low-cost sensing
Jose A Flores-Bravo1, Javier Madrigal2, Joseba Zubia1
1Department of Communications Engineering, University of the Basque Country UPV/EHU, 48013, Bilbao, Spain.
Scientific Reports
|January 25, 2022
Summary
This study introduces cost-effective coupled-core fiber Bragg gratings for sensing applications. These gratings offer simple, fast interrogation by detecting bending-induced reflectivity changes, enabling new sensor development.
Area of Science:
- Photonics and Optical Engineering
- Materials Science and Engineering
Background:
- Conventional fiber Bragg grating sensors are expensive due to complex interrogation systems.
- There is a need for cost-effective and high-speed optical sensing solutions.
Purpose of the Study:
- To propose and demonstrate coupled-core optical fiber Bragg gratings as an alternative sensing technology.
- To develop a simple, fast, and cost-effective interrogation method for fiber Bragg gratings.
Main Methods:
- Inscribing Bragg gratings in coupled-core optical fibers.
- Investigating the effect of point and periodic bending on grating reflectivity.
- Analyzing the supermode properties of the coupled-core fiber.
Main Results:
- Relative reflectivity of coupled-core fiber Bragg gratings changes significantly with bending.
- This change allows for simple, fast, and cost-effective interrogation.
- Demonstrated intensity-modulated vector bending and vibration sensing.
Conclusions:
- Coupled-core fiber Bragg gratings offer a promising platform for inexpensive optical sensors.
- The developed sensing method is suitable for vector bending and vibration detection.
- This technology can potentially expand the applications of fiber grating sensors.
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