Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors
The force-enhanced light coupling between two optical fibres is investigated for the application in a pressure or force sensor, which can be arranged into arrays and integrated into textile surfaces. The optical coupling mechanisms such as the influence of the applied force, the losses at the coupli...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/7/2402 |
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| author | Christian-Alexander Bunge Jan Kallweit Levent Colakoglu Thomas Gries |
| author_facet | Christian-Alexander Bunge Jan Kallweit Levent Colakoglu Thomas Gries |
| author_sort | Christian-Alexander Bunge |
| collection | DOAJ |
| description | The force-enhanced light coupling between two optical fibres is investigated for the application in a pressure or force sensor, which can be arranged into arrays and integrated into textile surfaces. The optical coupling mechanisms such as the influence of the applied force, the losses at the coupling point and the angular alignment of the two fibres are studied experimentally and numerically. The results reveal that most of the losses occur at the deformation of the pump fibre. Only a small percentage of the cross-coupled light from the pump fibre is actually captured by the probe fibre. Thus, the coupling and therefore the sensor signal can be strongly increased by a proper crossing angle between the fibres, which lead to a coupling efficiency of 3%, a sensitivity improvement of more than 20 dB compared to the orthogonal alignment of the two fibres. |
| first_indexed | 2024-03-10T12:45:43Z |
| format | Article |
| id | doaj.art-9cccab3273a348ce8e1fec5cb0ad01fb |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T12:45:43Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9cccab3273a348ce8e1fec5cb0ad01fb2023-11-21T13:31:36ZengMDPI AGSensors1424-82202021-03-01217240210.3390/s21072402Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force SensorsChristian-Alexander Bunge0Jan Kallweit1Levent Colakoglu2Thomas Gries3Faculty for Digital Transformation (F-DIT), HTWK Leipzig University of Applied Sciences, Zschochersche Str. 69, D-042289 Leipzig, GermanyInstitute for Textile Technology (ITA), RWTH Aachen University, Otto-Blumenthal-Str. 1, 52074 Aachen, GermanyInstitute for Textile Technology (ITA), RWTH Aachen University, Otto-Blumenthal-Str. 1, 52074 Aachen, GermanyInstitute for Textile Technology (ITA), RWTH Aachen University, Otto-Blumenthal-Str. 1, 52074 Aachen, GermanyThe force-enhanced light coupling between two optical fibres is investigated for the application in a pressure or force sensor, which can be arranged into arrays and integrated into textile surfaces. The optical coupling mechanisms such as the influence of the applied force, the losses at the coupling point and the angular alignment of the two fibres are studied experimentally and numerically. The results reveal that most of the losses occur at the deformation of the pump fibre. Only a small percentage of the cross-coupled light from the pump fibre is actually captured by the probe fibre. Thus, the coupling and therefore the sensor signal can be strongly increased by a proper crossing angle between the fibres, which lead to a coupling efficiency of 3%, a sensitivity improvement of more than 20 dB compared to the orthogonal alignment of the two fibres.https://www.mdpi.com/1424-8220/21/7/2402pressure sensorfibre sensorcross couplingray tracingsensor array |
| spellingShingle | Christian-Alexander Bunge Jan Kallweit Levent Colakoglu Thomas Gries Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors Sensors pressure sensor fibre sensor cross coupling ray tracing sensor array |
| title | Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors |
| title_full | Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors |
| title_fullStr | Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors |
| title_full_unstemmed | Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors |
| title_short | Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors |
| title_sort | analysis of fibre cross coupling mechanisms in fibre optical force sensors |
| topic | pressure sensor fibre sensor cross coupling ray tracing sensor array |
| url | https://www.mdpi.com/1424-8220/21/7/2402 |
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