All-fiber magnetic field sensor based on narrow-bandwidth laser internal cavity modulation with coated magnetic fluid
In this paper we present a magnetic probe structure based on magneto-fluidic and laser internal cavity modulation. We used a single-mode-no-core-single-mode fiber structure coated by a magnetic fluid as a sensing element, and inserted the sensing element in the inner cavity of a laser. Highly sensitive, high signal-to-noise ratio (SNR), narrow half-height width (FWHM) sensing signals have been obtained using intra-laser cavity modulation. The magnetic detection sensitivity of the sensor was improved, and a sensing system with a magnetic detection sensitivity of 1.76 × 10<sup>-3</sup> mw/Oe and a linearity of 99.709% was achieved. The temperature sensitivity is 0.035 μW/°C. The limit error of the magnetic field sensor is ±0.006035%. Meanwhile, output signal index of the sensing system is FWHM<40pm.
Authors
- Xujin Li
- Yiguang Yang (ORCID: https://orcid.org/0009-0005-8032-0403)
- Haofeng Hu (ORCID: https://orcid.org/0000-0002-7441-1457)
- X. L. Cao (ORCID: https://orcid.org/0009-0009-3164-2958)
- Tiegen Liu (ORCID: https://orcid.org/0000-0002-5691-7358)
- Weihong Zhang (ORCID: https://orcid.org/0000-0002-8403-6128)
- Jianquan Yao (ORCID: https://orcid.org/0000-0003-3105-4370)
- Yan Liu (ORCID: https://orcid.org/0000-0003-2649-2552)
- Yibo Yuan (ORCID: https://orcid.org/0000-0001-9996-2557)
- Haodong Liu (ORCID: https://orcid.org/0009-0002-8529-3051)
- Degang Xu (ORCID: https://orcid.org/0000-0001-6903-0521)
Institutions
- Qilu University of Technology (CN)
- Tianjin University (CN)
- Institute of Oceanographic Instrumentation (CN)
- Shandong Academy of Sciences (CN)
- Shandong University of Science and Technology (CN)
Publication Details
- Journal
- Optics Express
- Published
- 2024-12-26
- DOI
- https://doi.org/10.1364/oe.549956
- Citations
- 3
- Primary Topic
- Advanced Fiber Optic Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.63
Funders
- National Natural Science Foundation of China