Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the c...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/19/10/2263 |
| _version_ | 1828358074009649152 |
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| author | Yunlong Wang Yunqi Liu Fang Zou Chen Jiang Chengbo Mou Tingyun Wang |
| author_facet | Yunlong Wang Yunqi Liu Fang Zou Chen Jiang Chengbo Mou Tingyun Wang |
| author_sort | Yunlong Wang |
| collection | DOAJ |
| description | We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the change in effective refractive index caused by the strong surface absorption and desorption of the porous PEG/PVA coatings. The sensor is sensitive in a wide range from 50% to 95% RH, with a highest sensitivity of 2.485 nm/%RH in the range 50–75% RH. The proposed RH sensor has the advantages of compact size, good reversibility, and stability, which makes it attractive for high-humidity environments. |
| first_indexed | 2024-04-14T03:24:00Z |
| format | Article |
| id | doaj.art-c627ad5d746046f3b131f5fb28c8c54f |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T03:24:00Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c627ad5d746046f3b131f5fb28c8c54f2022-12-22T02:15:14ZengMDPI AGSensors1424-82202019-05-011910226310.3390/s19102263s19102263Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite FilmYunlong Wang0Yunqi Liu1Fang Zou2Chen Jiang3Chengbo Mou4Tingyun Wang5Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, ChinaWe demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the change in effective refractive index caused by the strong surface absorption and desorption of the porous PEG/PVA coatings. The sensor is sensitive in a wide range from 50% to 95% RH, with a highest sensitivity of 2.485 nm/%RH in the range 50–75% RH. The proposed RH sensor has the advantages of compact size, good reversibility, and stability, which makes it attractive for high-humidity environments.https://www.mdpi.com/1424-8220/19/10/2263long-period fiber grating (LPFG)polymer coatinghumidity sensorPEGPVA |
| spellingShingle | Yunlong Wang Yunqi Liu Fang Zou Chen Jiang Chengbo Mou Tingyun Wang Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film Sensors long-period fiber grating (LPFG) polymer coating humidity sensor PEG PVA |
| title | Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film |
| title_full | Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film |
| title_fullStr | Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film |
| title_full_unstemmed | Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film |
| title_short | Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film |
| title_sort | humidity sensor based on a long period fiber grating coated with polymer composite film |
| topic | long-period fiber grating (LPFG) polymer coating humidity sensor PEG PVA |
| url | https://www.mdpi.com/1424-8220/19/10/2263 |
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