Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film
A relative humidity (RH) sensor based on single-mode–no-core–single-mode fiber (SNCS) structure is proposed and experimentally demonstrated. The agarose gel is coated on the no-core fiber (NCF) as the cladding, and multimode interference (MMI) occurs in the SNCS structure. The transmission spectrum...
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| Format: | Article |
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MDPI AG
2017-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/17/10/2353 |
| _version_ | 1828138783313231872 |
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| author | Wei Xu Jia Shi Xianchao Yang Degang Xu Feng Rong Junfa Zhao Jianquan Yao |
| author_facet | Wei Xu Jia Shi Xianchao Yang Degang Xu Feng Rong Junfa Zhao Jianquan Yao |
| author_sort | Wei Xu |
| collection | DOAJ |
| description | A relative humidity (RH) sensor based on single-mode–no-core–single-mode fiber (SNCS) structure is proposed and experimentally demonstrated. The agarose gel is coated on the no-core fiber (NCF) as the cladding, and multimode interference (MMI) occurs in the SNCS structure. The transmission spectrum of the sensor is modulated at different ambient relative humidities due to the tunable refractive index property of the agarose gel film. The relative humidity can be measured by the wavelength shift and intensity variation of the dip in the transmission spectra. The humidity response of the sensors, coated with different concentrations and coating numbers of the agarose solution, were experimentally investigated. The wavelength and intensity sensitivity is obtained as −149 pm/%RH and −0.075 dB/%RH in the range of 30% RH to 75% RH, respectively. The rise and fall time is tested to be 4.8 s and 7.1 s, respectively. The proposed sensor has a great potential in real-time RH monitoring. |
| first_indexed | 2024-04-11T18:41:44Z |
| format | Article |
| id | doaj.art-2eb86fd326104e3cb7154112b171fcb4 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:41:44Z |
| publishDate | 2017-10-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-2eb86fd326104e3cb7154112b171fcb42022-12-22T04:08:58ZengMDPI AGSensors1424-82202017-10-011710235310.3390/s17102353s17102353Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel FilmWei Xu0Jia Shi1Xianchao Yang2Degang Xu3Feng Rong4Junfa Zhao5Jianquan Yao6Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, ChinaInstitute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, ChinaInstitute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, ChinaInstitute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, ChinaTianjin Key Laboratory of Optoelectronic Detection Technology and Systems, Tianjin Polytechnic University, Tianjin 300387, ChinaTianjin Key Laboratory of Optoelectronic Detection Technology and Systems, Tianjin Polytechnic University, Tianjin 300387, ChinaInstitute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, ChinaA relative humidity (RH) sensor based on single-mode–no-core–single-mode fiber (SNCS) structure is proposed and experimentally demonstrated. The agarose gel is coated on the no-core fiber (NCF) as the cladding, and multimode interference (MMI) occurs in the SNCS structure. The transmission spectrum of the sensor is modulated at different ambient relative humidities due to the tunable refractive index property of the agarose gel film. The relative humidity can be measured by the wavelength shift and intensity variation of the dip in the transmission spectra. The humidity response of the sensors, coated with different concentrations and coating numbers of the agarose solution, were experimentally investigated. The wavelength and intensity sensitivity is obtained as −149 pm/%RH and −0.075 dB/%RH in the range of 30% RH to 75% RH, respectively. The rise and fall time is tested to be 4.8 s and 7.1 s, respectively. The proposed sensor has a great potential in real-time RH monitoring.https://www.mdpi.com/1424-8220/17/10/2353relative humidity measurementagaroseno-core fibermultimode interference |
| spellingShingle | Wei Xu Jia Shi Xianchao Yang Degang Xu Feng Rong Junfa Zhao Jianquan Yao Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film Sensors relative humidity measurement agarose no-core fiber multimode interference |
| title | Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film |
| title_full | Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film |
| title_fullStr | Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film |
| title_full_unstemmed | Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film |
| title_short | Relative Humidity Sensor Based on No-Core Fiber Coated by Agarose-Gel Film |
| title_sort | relative humidity sensor based on no core fiber coated by agarose gel film |
| topic | relative humidity measurement agarose no-core fiber multimode interference |
| url | https://www.mdpi.com/1424-8220/17/10/2353 |
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