Temperature and Strain Characterization of Tapered Fiber Bragg Gratings
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| Publicado en: | Sensors vol. 25, no. 24 (2025), p. 7520-7537 |
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| Autor principal: | |
| Otros Autores: | , , |
| Publicado: |
MDPI AG
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| Acceso en línea: | Citation/Abstract Full Text + Graphics Full Text - PDF |
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| 001 | 3286352298 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 1424-8220 | ||
| 024 | 7 | |a 10.3390/s25247520 |2 doi | |
| 035 | |a 3286352298 | ||
| 045 | 2 | |b d20250101 |b d20251231 | |
| 084 | |a 231630 |2 nlm | ||
| 100 | 1 | |a de Moura Camila Carvalho |u CPGEI—Programa de Pós-Graduação em Engenharia Elétrica e Informática Industrial, Universidade Tecnológica Federal do Paraná, Curitiba 80230-901, Brazil; valmir@utfpr.edu.br | |
| 245 | 1 | |a Temperature and Strain Characterization of Tapered Fiber Bragg Gratings | |
| 260 | |b MDPI AG |c 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a This work presents a systematic experimental investigation of tapered fiber Bragg gratings (tFBGs) fabricated from standard SMF-28 fiber with waist diameters ranging from 30 to 115 µm. The effects of taper geometry on strain and temperature sensitivities were evaluated using UV inscription through two phase masks to ensure reproducibility. The maximum strain sensitivity achieved was 25.38 ± 0.06 pm/N for the 30 µm waist, corresponding to 20.84 ± 0.05 pm/µε—an enhancement of more than 1600% compared to a standard untapered FBG. In contrast, the thermal sensitivity remained nearly constant at ~12.5 pm/°C for all diameters, confirming that the temperature response is governed by the intrinsic thermo-optic and thermal-expansion properties of silica and is not significantly affected by taper geometry. The measured strain sensitivity exhibited a clear inverse-square dependence on the waist diameter, in excellent agreement with a simple axial-stress model. Consistent Bragg responses obtained using different phase-mask pitches further validated the repeatability of both the tapering and inscription processes. These results demonstrate that tapering standard telecom fiber provides a low-cost, scalable, and robust method to significantly enhance FBG strain sensitivity while preserving thermal stability, enabling compact and high-performance sensors for structural and industrial monitoring applications. | |
| 651 | 4 | |a United States--US | |
| 653 | |a Lasers | ||
| 653 | |a Inscriptions | ||
| 653 | |a Optics | ||
| 653 | |a Geometry | ||
| 653 | |a Reproducibility | ||
| 653 | |a Sensors | ||
| 653 | |a Microscopy | ||
| 653 | |a Heating | ||
| 700 | 1 | |a de Oliveira Valmir |u CPGEI—Programa de Pós-Graduação em Engenharia Elétrica e Informática Industrial, Universidade Tecnológica Federal do Paraná, Curitiba 80230-901, Brazil; valmir@utfpr.edu.br | |
| 700 | 1 | |a Kalinowski, Hypolito José |u Departamento acadêmico de Engenharia de Telecomunicações, Universidade Federal Fluminense, Niterói 24220-900, Brazil; hjkalinowski@id.uff.br | |
| 700 | 1 | |a Biazoli, Claudecir Ricardo |u Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas 13083-859, Brazil; claudecirbiazoli@gmail.com | |
| 773 | 0 | |t Sensors |g vol. 25, no. 24 (2025), p. 7520-7537 | |
| 786 | 0 | |d ProQuest |t Health & Medical Collection | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3286352298/abstract/embedded/75I98GEZK8WCJMPQ?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text + Graphics |u https://www.proquest.com/docview/3286352298/fulltextwithgraphics/embedded/75I98GEZK8WCJMPQ?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3286352298/fulltextPDF/embedded/75I98GEZK8WCJMPQ?source=fedsrch |