A Study of Optical Micro-bottle Resonator Humidity Sensor

• Published in: Journal of Physics: Conference Series
• Main Author: Ali U.U.M.; Johari A.A.; Jusoh Z.; Rahman H.A.; Harun S.W.
• Format: Conference paper
• Language: English
• Published: IOP Publishing Ltd 2021
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125588116&doi=10.1088%2f1742-6596%2f2075%2f1%2f012017&partnerID=40&md5=a7b0775797e65ac1046cd066922402b1

This experiment reports the fabrication of the optical Micro-bottle Resonator (MBR) as a relative humidity (RH) sensor. The MBR is fabricated via the "soften-and-compress" method to create the bottle-shaped with diameter Db = 175 um. The MBR is then optically excited using a 8 m microfiber and was found to have a Q Factor of <105. The MBR was then employed as a humidity sensor with the RH level percentage range between 40% to 100% and the performance is compared with a non MBR microfiber. The MBR sensor was found to have a sensitivity of 0.2973 dBm/%, linearity 90% and and is superior to the bare microfiber in all measured parameters . The MBR humidity sensor was also found to have good repeatability and stability over a period of 60 seconds compare to bare microfiber. © 2021 Institute of Physics Publishing. All rights reserved.