Evidence map›Paper›PMID 41318773›Full record

ArticleScientific reports2025

Optical fiber laser system for torsion measurement using a three-core fiber and a nanocrystal-based reflector.

Angel I Correa, Jose R Vento Alvarez, Marko Galarza, Arturo Sanchez Gonzalez, Romain Dauliat, Raphael Jamier, Philippe Roy, Georges Humbert, Rosa A Perez-Herrera, Manuel Lopez-Amo

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Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Angel I CorreaDepartment of Electrical, Electronic and Communication Engineering, Institute of Smart Cities (ISC), Public University of Navarra, Pamplona, 31006, Spain. angelignacio.correa@unavarra.es.
Jose R Vento AlvarezDepartment of Telecommunication and Electronic Engineering, University of Pinar del Río, Pinar del Río, Cuba.
Marko GalarzaDepartment of Electrical, Electronic and Communication Engineering, Institute of Smart Cities (ISC), Public University of Navarra, Pamplona, 31006, Spain.
Arturo Sanchez GonzalezDepartment of Electrical, Electronic and Communication Engineering, Institute of Smart Cities (ISC), Public University of Navarra, Pamplona, 31006, Spain.
Romain DauliatXLIM, UMR CNRS/University of Limoges, Limoges, 87060, France.
Raphael JamierXLIM, UMR CNRS/University of Limoges, Limoges, 87060, France.
Philippe RoyXLIM, UMR CNRS/University of Limoges, Limoges, 87060, France.
Georges HumbertXLIM, UMR CNRS/University of Limoges, Limoges, 87060, France.
Rosa A Perez-HerreraDepartment of Electrical, Electronic and Communication Engineering, Institute of Smart Cities (ISC), Public University of Navarra, Pamplona, 31006, Spain.
Manuel Lopez-AmoDepartment of Electrical, Electronic and Communication Engineering, Institute of Smart Cities (ISC), Public University of Navarra, Pamplona, 31006, Spain.

Funding

Ministerio de Ciencia e Innovación / Agencia Estatal de Investigación (MCIN/AEI) PID2022-137269OB-C21
6 · The paper itself

Abstract

We report a novel and highly sensitive torsion sensor that integrates a multicore fiber (MCF) within a Sagnac interferometer so that the same MCF segment serves as both the reflective element and the sensing head of a fiber-ring laser. The laser architecture incorporates a distributed reflector implemented as a ZnGa₂O₄-nanocrystal-doped fiber section, which enhances overall system performance. The device exhibits high torsional responsivity over 0°-150°, with distinct behavior across sub-ranges: in 0°-50°, phase analysis yields a sensitivity of 0.08 rad/° with R² = 0.991; in 88°-150°, amplitude analysis-under the ring-laser configuration-shows an improvement in sensitivity from 0.2 to 0.5 dBm/° (R² = 0.995). In the intermediate interval (50°-88°) neither phase nor power varies monotonically, so a function-fitting neural network was employed to bridge this gap, achieving a root-mean-square error of 0.06°. The system attains an angular resolution of 0.8°, ensuring accurate torsion estimation across the entire measurement span.

Indexed as

Multicore optical fiberNanocrystalsNeural networkSagnac interferometerTorsion sensor

Identifiers

PMID41318773
PMCPMC12769695

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.