Ammonia detection in water with balloon-like plastic optical fiber sensor
This work presents the demonstration of a plastic optical fiber(POF)-based ammonia sensor. The sensor head is formed by bending an unclad fiber optic sensor into a balloon-like structure. The bending radius of the balloon-like bent fiber optic sensor is varied from 1.0 to 2.5 cm. The performance of...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
iop
2023
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/10550/1/J16293_1984644aae1341d481b332d7afbad748.pdf http://eprints.uthm.edu.my/10550/ https://doi.org/10.1088/2631-8695/acdfbb |
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| Summary: | This work presents the demonstration of a plastic optical fiber(POF)-based ammonia sensor. The sensor head is formed by bending an unclad fiber optic sensor into a balloon-like structure. The bending radius of the balloon-like bent fiber optic sensor is varied from 1.0 to 2.5 cm. The performance of each sensor is tested using ammonia solution with concentration ranging from 0 to 15 mg l−1
. Results show that the optimized performances of the proposed sensor occur when the bending radius is fixed at 1.5 cm. At this bending radius, the sensor illustrates the sensitivity of − 0.0024 (mg/l) −1with linearity of 0.97 and resolution of − 4.17 mg l−1 . For comparison, the bent
sensor is compared to the straight sensor and performances of the former is found to be more superior.
In addition, the balloon-like bent sensor is further tested with real water samples. The sensor sensitivity is found to be − 0.0022 (mg/l) −1with linearity of 0.95 and resolution of − 4.54 mg l−1 . The result shows that the sensor has comparable performance in the ammonia detection for both pure
ammonia and real water samples. In essence, this balloon-like bent sensor functions without additional coating on the sensor head, making it favorable in terms of the simplicity of the design. |
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