Single-mode-multimode silica rod-single-mode high refractive index fiber sensor
This paper reports a robust high refractive index (RI) sensor based on a multimode silica rod structure. The sensor was fabricated by splicing a segment of multimode silica rod between two single-mode fiber (SMF) leads. The measurement of high-RI is realized by monitoring the change of power spectru...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Published: |
Institute of Electrical and Electronics Engineers Inc.
2022
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| Subjects: | |
| Online Access: | http://eprints.utm.my/104436/ http://dx.doi.org/10.1109/JSEN.2022.3168744 |
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| Summary: | This paper reports a robust high refractive index (RI) sensor based on a multimode silica rod structure. The sensor was fabricated by splicing a segment of multimode silica rod between two single-mode fiber (SMF) leads. The measurement of high-RI is realized by monitoring the change of power spectrum caused by the reaction of leaky modes to different surrounding high-RI. The 0.5-cm long multimode silica rod sensing element exhibits a sensitivity of up to 115.12 dBm/RIU for high-RI ranging between 1.450 and 1.531. The sensor also demonstrated its potential in power transformer application by distinguishing various ageing levels of transformer oil. The leaky modes mechanism in all-silica based structure is essentially temperature insensitive, and therefore very practical to be deployed in extreme temperature conditions. |
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