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Single-mode-multimode silica rod-single-mode high refractive index fiber sensor

Saimon, Siti Mahfuza and Mohd. Noor, Muhammad Yusof and Azmi, Asrul Izam and Abdullah, Ahmad Sharmi and Ibrahim, Mohd. Haniff and Salim, Mohd. Rashidi and Ahmad, Mohd. Hafizi and Othman, Ahmad Fauzi (2022) Single-mode-multimode silica rod-single-mode high refractive index fiber sensor. IEEE Sensors Journal, 22 (11). pp. 10559-10566. ISSN 1530-437X

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Official URL: http://dx.doi.org/10.1109/JSEN.2022.3168744

Abstract

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.

Item Type:Article
Uncontrolled Keywords:Fiber optic sensor, high refractive index sensor, multimode structure, silica rod, transformer oil
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:104436
Deposited By: Widya Wahid
Deposited On:04 Feb 2024 10:03
Last Modified:04 Feb 2024 10:03

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