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- Title
High-Sensitivity Curvature Fiber Sensor Based on Miniature Two-Path Mach–Zehnder Interferometer.
- Authors
Wu, Yue; Liu, Yu; Zhuang, Haoran; Cao, Juan; Yang, Yongjie; Zhu, Xiaojun; Sun, Dan; Shi, Yuechun; Tao, Rumao
- Abstract
This paper introduces a new high-sensitivity curvature fiber sensor based on a miniature two-path Mach–Zehnder interferometer (MTP-MZI). The sensor is fabricated by coupling and fusing the multimode fiber (MMF) with the single-mode fiber (SMF) using arc fusion technology (AFT), resulting in a centimeter-level two-path MZI structure. The sensor represents an innovative approach to MZI coupling technology, which reduces device size, simplifies manufacturing, and lowers costs. In curvature-sensing experiments, the MTP-MZI sensor achieves a maximum curvature sensitivity of −96.70 dB/m−1 in the curvature range of 0.0418 m−1 to 0.0888 m−1, which is an extremely high sensitivity among intensity-modulated curvature sensors. Additionally, temperature-sensing measurements of the MTP-MZI sensor show a maximum temperature sensitivity of 212 pm/°C in the range of 30 °C to 70 °C, which is low temperature sensitivity and solves the cross-sensitivity problem. Thanks to the miniature two-path structure of the MTP-MZI, it provides a new perspective for developing multidimensional and multiparameter measurement methods in MZI fiber sensors.
- Subjects
LOW temperatures; CURVATURE; INTERFEROMETERS; DETECTORS; PROBLEM solving; TEMPERATURE sensors
- Publication
Micromachines, 2024, Vol 15, Issue 8, p963
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi15080963