Microbottle resonator for formaldehyde liquid sensing

Johari, Md Ashadi Md and Al Noman, Abdullah and Abdul Khudus, Muhammad Imran Mustafa and Jali, Mohd Hafiz and Yusof, Haziezol Helmi Mohd and Harun, Sulaiman Wadi and Yasin, Moh (2018) Microbottle resonator for formaldehyde liquid sensing. Optik, 173. pp. 180-184. ISSN 0030-4026

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Official URL: https://doi.org/10.1016/j.ijleo.2018.08.022

Abstract

We have successfully investigated the use of a whispering gallery mode (WGM) optical micro-bottle resonator (MBR) for liquid formaldehyde (CH 2 O) sensing. The MBR was fabricated via the “soften-and-compress” method to create a bulge (bottle) structure with a bottle diameter of 190 μm. The MBR was optically excited by using a non-adiabatic 2 μm optical microfiber and was found to have a Q-factor of >10 5 . The MBR was then employed to measure formaldehyde concentration within 1–5% range and the performance was compared with a bare microfiber. The MBR sensor was found to have a sensitivity of 4.397 dB/% with 90% linearity which were superior to the bare microfiber. The MBR sensor was also found to have good repeatability and stability over a period of 60 min. This indicates that MBR sensor has a great potential to be employed as a low cost formaldehyde liquid sensor.

Item Type: Article
Uncontrolled Keywords: Whispering gallery mode; Optical microbottle resonator; Tapered microfiber; Quality factor; Formaldehyde liquid
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Aug 2019 00:51
Last Modified: 02 Aug 2019 00:51
URI: http://eprints.um.edu.my/id/eprint/21735

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