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Ultrahigh-resolution whispering gallery mode thermometer based silica-microsphere

Date
2024
Abstract
This paper proposes and implements a high-resolution sensing system using an ordinary microsphere whispering gallery mode (WGM) sensor. In exceptional cases, the microsphere resonators can produce satisfactory and dense resonant dips when coupled with tapered fiber, and these resonant dips usually have extremely high-quality factors. This paper explores the advantages of Pound-Drever-Hall (PDH) laser frequency stabilization technology in characterizing the resonance dip variation of high-order WGM in microsphere cavities. PDH technology reduces the difficulty of sensor signal monitoring and improves the detection accuracy and resolution of the WGM sensor. Finally, the system monitors the ambient temperature continuously in real-time and achieves an ultra-high resolution of 2.32×10-5 °C.
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Publisher
University of Limerick
Citation
20th Sensors and Their Applications Conference, 2024, Paper No: 15
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20th Sensors & Their Applications Conference
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Paper_15.pdf
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Keywords
whispering gallery mode, silica microsphere, fiber thermometer, Pound-Drever-Hall technology, quality factor, Engineering
ULRR Identifiers
https://doi.org/10.34961/researchrepository-ul.29270282
 https://researchrepository.ul.ie/handle/10344/14782
Funding code
Funding Information
The Basic Research Support Program for Excellent Young Teachers of Heilongjiang Province (YQJH2023281); Taishan Scholars Program; China Postdoctoral Science Foundation (2022M720940); Qingdao Natural Science Foundation (23-2-1-214-zyyd-jch); Fundamental Research Funds of Harbin Engineering University
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Type
Meetings and Proceedings
Rights
https://creativecommons.org/licenses/by-nc-sa/4.0/
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