ORCID

Abstract

Mechanical force sensors are critical for a wide range of advanced applications. This paper presents a high-performance whispering gallery mode (WGM) force sensor based on a glass-supported microbubble resonator (MBR). By incorporating the proposed glass support design, the proposed sensor achieves the highest force sensitivity reported for MBR-based structures, of 125.71 pm/mN and a detection limit of 52.26 μN. The sensor has a response time of 3.5 ms, enabling rapid detection of dynamic force changes. Further tests show that the sensor is capable of detecting subtle forces, such as those created by water droplets and a gentle breeze, paving the way for potential applications in health monitoring, vibration detection, and other dynamic force-sensing scenarios.

Keywords

Force sensor, microbubble resonator, optical fiber sensor, whispering gallery modes

Publication Date

2025-01-01

Publication Title

Journal of Lightwave Technology

Volume

43

Issue

12

ISSN

0733-8724

First Page

5989

Last Page

5995

Acceptance Date

2025-01-01

Deposit Date

2025-07-29

Funding

This work was supported in part by the European Union’s Horizon Europe Program through Marie Sklodowska - Curie Actions Doctoral Networks (MSCA-DN) Project OWIN6G (Optical and wireless sensors networks for 6G scenarios) under Agreement no. 101119624, in part by the Engineering and Physical Sciences Research Council of United Kingdom under Grant EP/Y034538/1 and Grant EP/Y036115/1, in part by Taighde ireann Research Ireland under Grant 13/RC/2077_P2 at CONNECT: The Research Ireland Centre for Future Networks under Grant 18/CRT/6222, in part by Royal Society International Exchanges 2022 under Grant IES\R3\223005, and in part by the Government of Ireland Postdoctoral Fellowship 2024 under Project ID: GOIPD/2024/181.

Creative Commons License

Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.


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