Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer
A novel fiber-optic magnetic field sensor, based on a Sagnac structure, is proposed with the approach of polarization interference detection. The sensor takes advantage of common path interference, combining with a high magnetic field sensitivity sensing unit, composed of magneto-optical crystal, an...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/2/101 |
| _version_ | 1827755875905830912 |
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| author | Cui Liang Zhihang Zhang Dengwei Zhang Tengchao Huang Shuangliang Che |
| author_facet | Cui Liang Zhihang Zhang Dengwei Zhang Tengchao Huang Shuangliang Che |
| author_sort | Cui Liang |
| collection | DOAJ |
| description | A novel fiber-optic magnetic field sensor, based on a Sagnac structure, is proposed with the approach of polarization interference detection. The sensor takes advantage of common path interference, combining with a high magnetic field sensitivity sensing unit, composed of magneto-optical crystal, and magnetic field concentrators, to achieve high resolution, high stability, and large dynamic measurement of DC magnetic field signals. In this paper, the theoretical model is established and the related theory is derived in detail. The key technologies in the system are thoroughly investigated and verified. Experimental research on the proposed system is demonstrated and the results show that a DC magnetic field resolution of 5.6 nT and a dynamic range of larger than 70 dB is achieved. Furthermore, the linearity of the system is greater than 99.8% and the instability is less than 0.5%. |
| first_indexed | 2024-03-11T08:16:10Z |
| format | Article |
| id | doaj.art-c362df4173594f1dbcd750414a23f4ba |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-11T08:16:10Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-c362df4173594f1dbcd750414a23f4ba2023-11-16T22:44:23ZengMDPI AGPhotonics2304-67322023-01-0110210110.3390/photonics10020101Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac InterferometerCui Liang0Zhihang Zhang1Dengwei Zhang2Tengchao Huang3Shuangliang Che4State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, ChinaA novel fiber-optic magnetic field sensor, based on a Sagnac structure, is proposed with the approach of polarization interference detection. The sensor takes advantage of common path interference, combining with a high magnetic field sensitivity sensing unit, composed of magneto-optical crystal, and magnetic field concentrators, to achieve high resolution, high stability, and large dynamic measurement of DC magnetic field signals. In this paper, the theoretical model is established and the related theory is derived in detail. The key technologies in the system are thoroughly investigated and verified. Experimental research on the proposed system is demonstrated and the results show that a DC magnetic field resolution of 5.6 nT and a dynamic range of larger than 70 dB is achieved. Furthermore, the linearity of the system is greater than 99.8% and the instability is less than 0.5%.https://www.mdpi.com/2304-6732/10/2/101weak magnetic field sensorsagnac structurepolarization interference detection |
| spellingShingle | Cui Liang Zhihang Zhang Dengwei Zhang Tengchao Huang Shuangliang Che Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer Photonics weak magnetic field sensor sagnac structure polarization interference detection |
| title | Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer |
| title_full | Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer |
| title_fullStr | Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer |
| title_full_unstemmed | Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer |
| title_short | Fiber Optic All-Polarization Weak Magnetic Field Sensor Based on Sagnac Interferometer |
| title_sort | fiber optic all polarization weak magnetic field sensor based on sagnac interferometer |
| topic | weak magnetic field sensor sagnac structure polarization interference detection |
| url | https://www.mdpi.com/2304-6732/10/2/101 |
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