Anti-Crosstalk Fiber-Optic Liquid Level Sensor Based on Hollow-Core Bragg Fiber
In this letter, we develop a novel fiber-optic sensor based on a hollow-core Bragg fiber (HCBF) for high-precision detection of liquid level. The intensity responses of anti-resonance reflecting optical waveguide are theoretically analyzed in terms of level and refractive index (RI) of liquid. Simultaneous measurements are conducted and the obvious intensity variations as the changed liquid level are exhibited, with near-zero RI crosstalk. The average liquid level sensitivity reaches −11.24 dB/cm in the range of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0 \sim 4$ </tex-math></inline-formula> cm, with high linearity. Additionally, high repeatability and low temperature intensity drift guarantee the measurement error can be constrained within 0.03 mm.
Authors
- Liangtao Hou (ORCID: https://orcid.org/0000-0002-9572-0582)
- Qing Chang (ORCID: https://orcid.org/0000-0003-4169-7994)
- Qi Sheng
- Cun Chang
- Feng Zhou (ORCID: https://orcid.org/0000-0002-4429-2258)
- Jianwei Li (ORCID: https://orcid.org/0000-0003-0194-7792)
Institutions
- Harbin Institute of Technology (CN)
- Communication University of Zhejiang (CN)
- Heilongjiang University (CN)
Publication Details
- Journal
- IEEE Photonics Technology Letters
- Published
- 2025-03-14
- DOI
- https://doi.org/10.1109/lpt.2025.3551497
- Citations
- 1
- Primary Topic
- Semiconductor Lasers and Optical Devices
- Type
- article
- Field-Weighted Citation Impact
- 0.73