Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching
We propose a seawater salinity sensor array based on a micro/nanofiber Bragg grating structures, which allows for the simultaneous measurement of temperature and salinity. The proposed sensing structure is fabricated through a process involving optical fiber tapering, femtosecond laser inscription,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/12/1315 |
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| author | Gaochao Li Yongjie Wang Mengchao Yan Tuanwei Xu Ancun Shi Yuanhui Liu Xuechun Li Fang Li |
| author_facet | Gaochao Li Yongjie Wang Mengchao Yan Tuanwei Xu Ancun Shi Yuanhui Liu Xuechun Li Fang Li |
| author_sort | Gaochao Li |
| collection | DOAJ |
| description | We propose a seawater salinity sensor array based on a micro/nanofiber Bragg grating structures, which allows for the simultaneous measurement of temperature and salinity. The proposed sensing structure is fabricated through a process involving optical fiber tapering, femtosecond laser inscription, and chemical etching. The equivalent refractive index (RI) of this sensor structure is influenced by the surrounding RI, resulting in a Bragg characteristic wavelength shift that can be used for salinity sensing. The experimental results show that the salinity sensitivity for two cascaded sensor arrays is 8.39 pm/‰ and 7.71 pm/‰, while the temperature sensitivity is 8.28 pm/°C and 8.03 pm/°C, respectively. This sensor structure is compact, exhibits excellent linearity, and offers good repeatability. It holds great potential for applications in seawater environmental monitoring and quantitative studies of seawater dispersion characteristics. |
| first_indexed | 2024-03-08T20:25:48Z |
| format | Article |
| id | doaj.art-2c1953f1d65e45468401c4374448dc0d |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-08T20:25:48Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-2c1953f1d65e45468401c4374448dc0d2023-12-22T14:32:45ZengMDPI AGPhotonics2304-67322023-11-011012131510.3390/photonics10121315Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF EtchingGaochao Li0Yongjie Wang1Mengchao Yan2Tuanwei Xu3Ancun Shi4Yuanhui Liu5Xuechun Li6Fang Li7State Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaWe propose a seawater salinity sensor array based on a micro/nanofiber Bragg grating structures, which allows for the simultaneous measurement of temperature and salinity. The proposed sensing structure is fabricated through a process involving optical fiber tapering, femtosecond laser inscription, and chemical etching. The equivalent refractive index (RI) of this sensor structure is influenced by the surrounding RI, resulting in a Bragg characteristic wavelength shift that can be used for salinity sensing. The experimental results show that the salinity sensitivity for two cascaded sensor arrays is 8.39 pm/‰ and 7.71 pm/‰, while the temperature sensitivity is 8.28 pm/°C and 8.03 pm/°C, respectively. This sensor structure is compact, exhibits excellent linearity, and offers good repeatability. It holds great potential for applications in seawater environmental monitoring and quantitative studies of seawater dispersion characteristics.https://www.mdpi.com/2304-6732/10/12/1315salinity sensor arrayoptical fiber gratingmicro/nanofiberfiber-optic sensorseawater temperature |
| spellingShingle | Gaochao Li Yongjie Wang Mengchao Yan Tuanwei Xu Ancun Shi Yuanhui Liu Xuechun Li Fang Li Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching Photonics salinity sensor array optical fiber grating micro/nanofiber fiber-optic sensor seawater temperature |
| title | Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching |
| title_full | Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching |
| title_fullStr | Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching |
| title_full_unstemmed | Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching |
| title_short | Fiber Bragg Grating Salinity Sensor Array Based on Fiber Tapering and HF Etching |
| title_sort | fiber bragg grating salinity sensor array based on fiber tapering and hf etching |
| topic | salinity sensor array optical fiber grating micro/nanofiber fiber-optic sensor seawater temperature |
| url | https://www.mdpi.com/2304-6732/10/12/1315 |
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