Microfiber loop resonator for formaldehyde liquid sensing
Document Type
Article
Publication Date
1-1-2019
Abstract
This work employed the whispering gallery mode (WGM) of microfiber loop resonator (MLR) for formaldehyde (CH2O) liquid sensing application. A significant sensing response to different concentrations of formaldehyde liquid from 0% to 5% was observed due to the surface absorption and changeable refractive index resulting in different light attenuation in the silica microfiber. As the concentration increases, the output power of the MLR decreased linearly from −18.9 dB m to −36.2.dBm with sensitivity increased by a factor of 2.5 as compared to straight microfiber (SmF). As for resolution, the MLR improved by a factor of 3.28 as compared to SmF. © 2019 Elsevier GmbH
Keywords
Whispering gallery mode, Microfiber loop resonator, Formaldehyde, Straight microfiber
Divisions
fac_eng
Funders
University of Malaya, Universiti Teknikal Malaysia Melaka and Ministry of Education, Malaysia for their financial support: ( FRGS/1/2018/TK04/UTEM/02/30 )
Publication Title
Optik
Volume
196
Publisher
Elsevier