Whispering gallery modes on optical micro-bottle resonator for humidity sensor application

Md Johari, Md Ashadi and Jali, Mohd Hafiz and Abdul Khudus, Muhammad Imran Mustafa and Al Noman, Abdullah and Wadi Harun, Sulaiman (2019) Whispering gallery modes on optical micro-bottle resonator for humidity sensor application. Optik, 185. pp. 558-565. ISSN 0030-4026

Text WHISPERING GALLERY MODES ON OPTICAL MICRO-BOTTLE RESONATOR FORHUMIDITY SENSOR APPLICATION.PDF Download (1MB)

Abstract

We investigate the use of a class of whispering gallery mode optical resonators, namely, optical microbottle resonators (MBR) as a relative humidity (RH) sensor. The MBR is fabricated via the so-called “soften-and-compress” method to create a bulge (bottle) structure with a bottle diameter Db = 190μm, stem diameter of Ds = 125μm and bottle length of Lb = 182μm. The MBR is then optically excited by using a 2 μm optical microfiber and was found to have a Q-factor of > 104. The MBR was then employed as a humidity sensor with a RH range of between 40%–80% and the performance is compared with a no-MBR microfiber. The MBR RH sensor was found to have a sensitivity 0.0487 dB/%, linearity > 90% and P-value > 105 and is superior to the no-MBR microfiber in all measured parameters. The MBR RH sensor was also found to have good repeatability and stability over a period of 60 s. The wavelength shifted for the MBR is 0.03 nm greater than no-MBR

Item Type:	Article
Uncontrolled Keywords:	Microfiber optic, Optical Micro-resonator, Humidity sensor
Divisions:	Faculty of Electrical and Electronic Engineering Technology
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	22 Dec 2020 12:11
Last Modified:	22 Dec 2020 12:11
URI:	http://eprints.utem.edu.my/id/eprint/24205
Statistic Details:	View Download Statistic

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