Comparative characterization study of high-Q optical microbottle resonators via tapered fibre coupling at neck and maximum curvature regions

Mohd Farid, Sabrina and Azahan, Siti Nurul Fatihah and Mohd Yusof, Muhammad Khudhori and Zulkifli, Mohd Zamani (2025) Comparative characterization study of high-Q optical microbottle resonators via tapered fibre coupling at neck and maximum curvature regions. PERINTIS e-Journal, 15 (2). pp. 47-55. E-ISSN 2232-0725

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Abstract

Whispering gallery modes (WGM) such as microbottle resonators is a miniature light confining photonics device and are a promising component in photonic systems such as sensors, lasers, and optical filters due to their efficient light confinement and compact geometry. However, the effect of coupling position on their optical performance remains insufficiently explored. This study investigates the fabrication and characterization of optical microbottle resonators using tapered fibre coupling at two regions which are the neck and the maximum curvature. The microbottles were produced through controlled heating and surface-tension shaping of single-mode optical fibres, followed by precise light coupling via a tapered fibre. Experimental results show Q-factors of 12,492 at the neck and 16,843 at the maximum curvature, indicating stronger confinement and reduced scattering losses in the latter. These findings demonstrate the influence of coupling position on resonator performance and support the design of efficient microresonators for advanced photonic applications. Through the lens of Tawhidic epistemology, the ability of such microscopic structures to precisely confine and guide light reflects the immense power and wisdom of Allah

Item Type:	Article (Journal)
Uncontrolled Keywords:	Whispering gallery modes (WGM), microbottle, tapered fibre coupling, coupling region, Q-factors
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr M Z Zulkifli
Date Deposited:	16 Jul 2026 17:31
Last Update:	16 Jul 2026 17:31
Queue Number:	2026-07-Q4056
URI:	http://irep.iium.edu.my/id/eprint/129921

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