Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper
This paper presents the fabrication of a fiber Bragg grating (FBG)-based Fabry-Perot (FP) structure (7 mm total length) in an adiabatic fiber taper, investigates its strain and temperature characteristics, and compares the sensing characteristics with a standard polyimide coated FBG sensor. Firstly,...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/146250 |
| _version_ | 1811678193968480256 |
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| author | Madan, Aayush Yap, Stephanie Hui Kit Paulose, Varghese Chang, Wonkeun Shum, Perry Ping Hao, Jianzhong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Madan, Aayush Yap, Stephanie Hui Kit Paulose, Varghese Chang, Wonkeun Shum, Perry Ping Hao, Jianzhong |
| author_sort | Madan, Aayush |
| collection | NTU |
| description | This paper presents the fabrication of a fiber Bragg grating (FBG)-based Fabry-Perot (FP) structure (7 mm total length) in an adiabatic fiber taper, investigates its strain and temperature characteristics, and compares the sensing characteristics with a standard polyimide coated FBG sensor. Firstly, a simulation of the said structure is presented, followed by the fabrication of an adiabatic fiber taper having the outer diameter reduced to 70 μm (core diameter to 4.7 μm). Next, the sensing structure, composed of two identical uniform FBG spaced apart by a small gap, is directly inscribed point-by-point using infrared femtosecond laser (fs-laser) micromachining. Lastly, the strain and temperature behavior for a range up to 3400 με and 225 °C, respectively, are investigated for the fabricated sensor and the FBG, and compared. The fabricated sensor attains a higher strain sensitivity (2.32 pm/με) than the FBG (0.73 pm/με), while both the sensors experience similar sensitivity to temperature (8.85 pm/°C). The potential applications of such sensors include continuous health monitoring where precise strain detection is required. |
| first_indexed | 2024-10-01T02:49:23Z |
| format | Journal Article |
| id | ntu-10356/146250 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:49:23Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1462502021-02-04T03:42:12Z Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper Madan, Aayush Yap, Stephanie Hui Kit Paulose, Varghese Chang, Wonkeun Shum, Perry Ping Hao, Jianzhong School of Electrical and Electronic Engineering Institute for Infocomm Research, A*STAR Engineering::Electrical and electronic engineering Fabry–Perot Microfiber Sensor Structure This paper presents the fabrication of a fiber Bragg grating (FBG)-based Fabry-Perot (FP) structure (7 mm total length) in an adiabatic fiber taper, investigates its strain and temperature characteristics, and compares the sensing characteristics with a standard polyimide coated FBG sensor. Firstly, a simulation of the said structure is presented, followed by the fabrication of an adiabatic fiber taper having the outer diameter reduced to 70 μm (core diameter to 4.7 μm). Next, the sensing structure, composed of two identical uniform FBG spaced apart by a small gap, is directly inscribed point-by-point using infrared femtosecond laser (fs-laser) micromachining. Lastly, the strain and temperature behavior for a range up to 3400 με and 225 °C, respectively, are investigated for the fabricated sensor and the FBG, and compared. The fabricated sensor attains a higher strain sensitivity (2.32 pm/με) than the FBG (0.73 pm/με), while both the sensors experience similar sensitivity to temperature (8.85 pm/°C). The potential applications of such sensors include continuous health monitoring where precise strain detection is required. Published version 2021-02-04T03:42:11Z 2021-02-04T03:42:11Z 2020 Journal Article Madan, A., Yap, S. H. K., Paulose, V., Chang, W., Shum, P. P., & Hao, J. (2020). Investigation of a Bragg Grating-Based Fabry–Perot Structure Inscribed Using Femtosecond Laser Micromachining in an Adiabatic Fiber Taper. Applied Sciences, 10(3), 1069-. doi:10.3390/app10031069 2076-3417 0000-0002-2847-9936 0000-0002-9514-5194 https://hdl.handle.net/10356/146250 10.3390/app10031069 2-s2.0-85081537725 3 10 en Applied Sciences © 2020 The Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (http://creativecommons.org/licenses/by/4.0/). application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Fabry–Perot Microfiber Sensor Structure Madan, Aayush Yap, Stephanie Hui Kit Paulose, Varghese Chang, Wonkeun Shum, Perry Ping Hao, Jianzhong Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| title | Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| title_full | Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| title_fullStr | Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| title_full_unstemmed | Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| title_short | Investigation of a Bragg grating-based Fabry-Perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| title_sort | investigation of a bragg grating based fabry perot structure inscribed using femtosecond laser micromachining in an adiabatic fiber taper |
| topic | Engineering::Electrical and electronic engineering Fabry–Perot Microfiber Sensor Structure |
| url | https://hdl.handle.net/10356/146250 |
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