Femtosecond Laser Line-by-Line Inscribed Seven Core Fiber Cascaded Fabry–Perot Cavity and Its Vectorial Bending Sensing Application
Multi-core fibers have been widely used for vector-bending sensing due to their off-axis distributed cores. In contrast to vector-bending sensors based on Bragg gratings, fiber Fabry–Perot (F–P) interferometers are more advantageous due to their ease of fabrication and potential for introducing the...
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| Published in | Photonics Vol. 10; no. 6; p. 605 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
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| Abstract | Multi-core fibers have been widely used for vector-bending sensing due to their off-axis distributed cores. In contrast to vector-bending sensors based on Bragg gratings, fiber Fabry–Perot (F–P) interferometers are more advantageous due to their ease of fabrication and potential for introducing the Vernier effect to further improve sensitivity. We propose and experimentally demonstrate a cascaded Fabry–Perot (F–P) cavity vector bending sensor. From the experimental results, the sensor has a strong bending dependence with a maximum sensitivity of 123.12 pm/m−1, and the curvature magnitude and direction can be reconstructed from the tilted wavelength shift of the asymmetric fiber-core F–P cavities. |
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| AbstractList | Multi-core fibers have been widely used for vector-bending sensing due to their off-axis distributed cores. In contrast to vector-bending sensors based on Bragg gratings, fiber Fabry–Perot (F–P) interferometers are more advantageous due to their ease of fabrication and potential for introducing the Vernier effect to further improve sensitivity. We propose and experimentally demonstrate a cascaded Fabry–Perot (F–P) cavity vector bending sensor. From the experimental results, the sensor has a strong bending dependence with a maximum sensitivity of 123.12 pm/m−1, and the curvature magnitude and direction can be reconstructed from the tilted wavelength shift of the asymmetric fiber-core F–P cavities. Multi-core fibers have been widely used for vector-bending sensing due to their off-axis distributed cores. In contrast to vector-bending sensors based on Bragg gratings, fiber Fabry–Perot (F–P) interferometers are more advantageous due to their ease of fabrication and potential for introducing the Vernier effect to further improve sensitivity. We propose and experimentally demonstrate a cascaded Fabry–Perot (F–P) cavity vector bending sensor. From the experimental results, the sensor has a strong bending dependence with a maximum sensitivity of 123.12 pm/m[sup.−1], and the curvature magnitude and direction can be reconstructed from the tilted wavelength shift of the asymmetric fiber-core F–P cavities. |
| Audience | Academic |
| Author | Bai, Chenglin Zhang, Yanqing Zhang, Liqiang Nie, Zhaogang Wang, Minghong Yao, Yicun Ma, Haili |
| Author_xml | – sequence: 1 givenname: Yanqing orcidid: 0009-0001-0812-3924 surname: Zhang fullname: Zhang, Yanqing – sequence: 2 givenname: Haili surname: Ma fullname: Ma, Haili – sequence: 3 givenname: Yicun orcidid: 0000-0001-7345-3404 surname: Yao fullname: Yao, Yicun – sequence: 4 givenname: Minghong surname: Wang fullname: Wang, Minghong – sequence: 5 givenname: Liqiang orcidid: 0000-0003-1854-5837 surname: Zhang fullname: Zhang, Liqiang – sequence: 6 givenname: Zhaogang surname: Nie fullname: Nie, Zhaogang – sequence: 7 givenname: Chenglin orcidid: 0000-0002-3790-2652 surname: Bai fullname: Bai, Chenglin |
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| SubjectTerms | Bragg gratings Electric fields Fabrication Fabry-Perot interferometers Fabry–Perot (F–P) femtosecond laser Fiber optics Fibers Holes Inscriptions Lasers Reproducibility SCF Sensitivity Sensors vector bending Vectors (mathematics) |
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| Title | Femtosecond Laser Line-by-Line Inscribed Seven Core Fiber Cascaded Fabry–Perot Cavity and Its Vectorial Bending Sensing Application |
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