Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber
This study proposes a novel multipoint transducer system by utilizing the single-mode-multimode-thin-cladding fiber (SMTC) structure. This structure leverages the disparity in mode field diameter between the multimode fiber (MMF) and thin-cladding fiber (TCF) to generate high-amplitude ultrasonic si...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/5/1491 |
| _version_ | 1797263866083672064 |
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| author | Shengnan Zhou Cheng Zhou Jiajun Tian Yong Yao |
| author_facet | Shengnan Zhou Cheng Zhou Jiajun Tian Yong Yao |
| author_sort | Shengnan Zhou |
| collection | DOAJ |
| description | This study proposes a novel multipoint transducer system by utilizing the single-mode-multimode-thin-cladding fiber (SMTC) structure. This structure leverages the disparity in mode field diameter between the multimode fiber (MMF) and thin-cladding fiber (TCF) to generate high-amplitude ultrasonic signals safely and efficiently. The fabricated transducer exhibits signal amplitudes 2–3-fold higher compared to conventional laser-ultrasonic transducers. Simulation analysis investigates the impact of the length of the MMF and the diameter of the TCF on coupling efficiency. The coupling efficiency of individual transducer units can be accurately controlled by adjusting the length of the MMF. A three-point energy-balanced laser-ultrasonic transducer system was achieved, with improved energy conversion efficiencies, and the optimal thickness of candle soot nanoparticles (CSNPs) is experimentally determined. Additionally, we carried out experiments to compare the performance of the proposed SMTC-based transducer system under different material conditions using two different photoacoustic materials: graphite–epoxy resin and candle soot nanoparticle–polydimethylsiloxane (CSNP–PDMS) composite. CSNPs, as a cost-effective and easy-to-prepare composite material, exhibit higher photoacoustic conversion efficiency compared to graphite–epoxy resin. The proposed system demonstrates the potential for applications in non-destructive testing techniques. |
| first_indexed | 2024-04-25T00:19:48Z |
| format | Article |
| id | doaj.art-30fdabceada042f3bed9a7300e0b93ac |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-25T00:19:48Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-30fdabceada042f3bed9a7300e0b93ac2024-03-12T16:54:57ZengMDPI AGSensors1424-82202024-02-01245149110.3390/s24051491Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding FiberShengnan Zhou0Cheng Zhou1Jiajun Tian2Yong Yao3School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaSchool of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaSchool of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaSchool of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaThis study proposes a novel multipoint transducer system by utilizing the single-mode-multimode-thin-cladding fiber (SMTC) structure. This structure leverages the disparity in mode field diameter between the multimode fiber (MMF) and thin-cladding fiber (TCF) to generate high-amplitude ultrasonic signals safely and efficiently. The fabricated transducer exhibits signal amplitudes 2–3-fold higher compared to conventional laser-ultrasonic transducers. Simulation analysis investigates the impact of the length of the MMF and the diameter of the TCF on coupling efficiency. The coupling efficiency of individual transducer units can be accurately controlled by adjusting the length of the MMF. A three-point energy-balanced laser-ultrasonic transducer system was achieved, with improved energy conversion efficiencies, and the optimal thickness of candle soot nanoparticles (CSNPs) is experimentally determined. Additionally, we carried out experiments to compare the performance of the proposed SMTC-based transducer system under different material conditions using two different photoacoustic materials: graphite–epoxy resin and candle soot nanoparticle–polydimethylsiloxane (CSNP–PDMS) composite. CSNPs, as a cost-effective and easy-to-prepare composite material, exhibit higher photoacoustic conversion efficiency compared to graphite–epoxy resin. The proposed system demonstrates the potential for applications in non-destructive testing techniques.https://www.mdpi.com/1424-8220/24/5/1491ultrasonic transducerfiber-opticthin-cladding fiberphotoacoustic materialstructural health monitoring |
| spellingShingle | Shengnan Zhou Cheng Zhou Jiajun Tian Yong Yao Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber Sensors ultrasonic transducer fiber-optic thin-cladding fiber photoacoustic material structural health monitoring |
| title | Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber |
| title_full | Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber |
| title_fullStr | Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber |
| title_full_unstemmed | Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber |
| title_short | Multipoint Energy-Balanced Laser-Ultrasonic Transducer Based on a Thin-Cladding Fiber |
| title_sort | multipoint energy balanced laser ultrasonic transducer based on a thin cladding fiber |
| topic | ultrasonic transducer fiber-optic thin-cladding fiber photoacoustic material structural health monitoring |
| url | https://www.mdpi.com/1424-8220/24/5/1491 |
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