Polyvinyl alcohol coating microbottle resonator on whispering gallery modes for ethanol liquid sensor

Johari, Md Ashadi Md and Bin Jali, Mohd Hafiz and Yusof, Haziezol Helmi Bin Mohd and Rahim, Hazli Rafis Bin Abdul and Ahmad, Aminah Binti and Khudus, Muhammad Imran Mustafa Abdul and Harun, Sulaiman Wadi (2021) Polyvinyl alcohol coating microbottle resonator on whispering gallery modes for ethanol liquid sensor. Optics & Laser Technology, 143. ISSN 0030-3992, DOI https://doi.org/10.1016/j.optlastec.2021.107379.

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This experimental paper study on the effect of polyvinyl alcohol (PVA) coating on whispering gallery modes on microbottle resonator (MBR) as liquid ethanol sensor. The silica fiber SMF-28 is used to create microbottle resonator using a technique known as ``soften-and-compress'' and formed in three sizes with bottle length L-b, stem diameter of D-s and bottle diameter of D-b. The MBR then coated with PVA using a drop-casting technique with the coating diameter < 10 mu m for all. The MBR-PVAs characterized with microfiber of 2 mu m and managed to have > 10(4) for Q-factor for all condition with MBR-PVA-C is the highest, 2.783 x 10(4). The ethanol liquid with concentrations ranging from 10% to 100 %ppm is used for sensing purposes. Sensitivity, linearity, repeatability and stability performance by MBR-PVAs then compared between transmitted spectral and wavelength shift analysis. The MBR-PVA-C defined to have the best performance for all than another size of MBR-PVAs. Transmitted spectral analysis showed the sensitivity is 0.2699 dB/%ppm with 99.2% of linearity, and wavelength shift analysis showed the sensitivity is 0.2 pm/%ppm with a linearity of 98.01% respectability. Hence, MBR-PVAs experienced three cycles of repeatability and a 60-second stability procedure for performance optimization.

Item Type: Article
Funders: None
Uncontrolled Keywords: Optical microbottle resonator; Whispering gallery modes; Ethanol sensor
Subjects: Q Science > QC Physics
Divisions: Faculty of Engineering
Faculty of Science
Depositing User: Ms Zaharah Ramly
Date Deposited: 21 Aug 2022 02:24
Last Modified: 21 Aug 2022 02:24
URI: http://eprints.um.edu.my/id/eprint/28779

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