Highly stable and ultracompact optical-fiber-tip temperature sensor based on the Fabry-Pérot interferometer wrapped with polydimethylsiloxane

Pan Meng; Jingwei Lv; Jianxin Wang; Renfeng Li; Liangliang Li; Weijie Kong; Wei Liu; Qiang Liu; Paul K Chu; Chao Liu

doi:10.1016/j.yofte.2026.104585

Highly stable and ultracompact optical-fiber-tip temperature sensor based on the Fabry-Pérot interferometer wrapped with polydimethylsiloxane

Pan Meng
, Jingwei Lv^*
, Jianxin Wang
, Renfeng Li
, Liangliang Li
, Weijie Kong
, Wei Liu
, Qiang Liu
, Paul K Chu
, Chao Liu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

An ultra-compact Fabry-Pérot (FP) interferometer integrating a microbubble with polydimethylsiloxane (PDMS) end-cap is fabricated with physical wrapping and fusion splicing methods for sensing ambient temperature. The mechanically robust polymer cap has an average diameter of 0.5 cm. The end-capped sensor exhibits a high temperature sensitivity of −6.818 × 10⁻² dB/°C, which is 10 times higher than that of the sensor composed of only microbubble without PDMS encapsulation. Due to its simple fabrication technique, high sensitivity, fast response, and good stability, the temperature sensor has significant potential in the bio-pharmaceutical, chemical, and environmental industries. © 2026 Elsevier Inc.

Original language	English
Article number	104585
Number of pages	9
Journal	Optical Fiber Technology
Volume	99
Online published	13 Feb 2026
DOIs	https://doi.org/10.1016/j.yofte.2026.104585
Publication status	Online published - 13 Feb 2026

Funding

This work was jointly supported by the National Natural Science Foundation of China [12304480], Heilongjiang Provincial Natural Science Foundation of China [JQ2023F001], as well as City University of Hong Kong Donation Research Grants [DON-RMG 9229021 and 9220061].

Research Keywords

Fabry-Pérot interferometer (FPI)
Polydimethylsiloxane (PDMS)
Temperature sensor

RGC Funding Information

RGC-funded

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10.1016/j.yofte.2026.104585

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@article{894946167a0e43058c247f28bf10d653,

title = "Highly stable and ultracompact optical-fiber-tip temperature sensor based on the Fabry-P{\'e}rot interferometer wrapped with polydimethylsiloxane",

abstract = "An ultra-compact Fabry-P{\'e}rot (FP) interferometer integrating a microbubble with polydimethylsiloxane (PDMS) end-cap is fabricated with physical wrapping and fusion splicing methods for sensing ambient temperature. The mechanically robust polymer cap has an average diameter of 0.5 cm. The end-capped sensor exhibits a high temperature sensitivity of −6.818 × 10−2 dB/°C, which is 10 times higher than that of the sensor composed of only microbubble without PDMS encapsulation. Due to its simple fabrication technique, high sensitivity, fast response, and good stability, the temperature sensor has significant potential in the bio-pharmaceutical, chemical, and environmental industries. {\textcopyright} 2026 Elsevier Inc.",

keywords = "Fabry-P{\'e}rot interferometer (FPI), Polydimethylsiloxane (PDMS), Temperature sensor",

author = "Pan Meng and Jingwei Lv and Jianxin Wang and Renfeng Li and Liangliang Li and Weijie Kong and Wei Liu and Qiang Liu and Chu, \{Paul K\} and Chao Liu",

year = "2026",

month = feb,

day = "13",

doi = "10.1016/j.yofte.2026.104585",

language = "English",

volume = "99",

journal = "Optical Fiber Technology",

issn = "1068-5200",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Highly stable and ultracompact optical-fiber-tip temperature sensor based on the Fabry-Pérot interferometer wrapped with polydimethylsiloxane

AU - Meng, Pan

AU - Lv, Jingwei

AU - Wang, Jianxin

AU - Li, Renfeng

AU - Li, Liangliang

AU - Kong, Weijie

AU - Liu, Wei

AU - Liu, Qiang

AU - Chu, Paul K

AU - Liu, Chao

PY - 2026/2/13

Y1 - 2026/2/13

N2 - An ultra-compact Fabry-Pérot (FP) interferometer integrating a microbubble with polydimethylsiloxane (PDMS) end-cap is fabricated with physical wrapping and fusion splicing methods for sensing ambient temperature. The mechanically robust polymer cap has an average diameter of 0.5 cm. The end-capped sensor exhibits a high temperature sensitivity of −6.818 × 10−2 dB/°C, which is 10 times higher than that of the sensor composed of only microbubble without PDMS encapsulation. Due to its simple fabrication technique, high sensitivity, fast response, and good stability, the temperature sensor has significant potential in the bio-pharmaceutical, chemical, and environmental industries. © 2026 Elsevier Inc.

AB - An ultra-compact Fabry-Pérot (FP) interferometer integrating a microbubble with polydimethylsiloxane (PDMS) end-cap is fabricated with physical wrapping and fusion splicing methods for sensing ambient temperature. The mechanically robust polymer cap has an average diameter of 0.5 cm. The end-capped sensor exhibits a high temperature sensitivity of −6.818 × 10−2 dB/°C, which is 10 times higher than that of the sensor composed of only microbubble without PDMS encapsulation. Due to its simple fabrication technique, high sensitivity, fast response, and good stability, the temperature sensor has significant potential in the bio-pharmaceutical, chemical, and environmental industries. © 2026 Elsevier Inc.

KW - Fabry-Pérot interferometer (FPI)

KW - Polydimethylsiloxane (PDMS)

KW - Temperature sensor

UR - https://www.scopus.com/pages/publications/105029757423

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105029757423&origin=recordpage

U2 - 10.1016/j.yofte.2026.104585

DO - 10.1016/j.yofte.2026.104585

M3 - RGC 21 - Publication in refereed journal

SN - 1068-5200

VL - 99

JO - Optical Fiber Technology

JF - Optical Fiber Technology

M1 - 104585

ER -

Highly stable and ultracompact optical-fiber-tip temperature sensor based on the Fabry-Pérot interferometer wrapped with polydimethylsiloxane

Abstract

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Research Keywords

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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Highly stable and ultracompact optical-fiber-tip temperature sensor based on the Fabry-Pérot interferometer wrapped with polydimethylsiloxane

Abstract

Funding

Research Keywords

RGC Funding Information

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Permanent Link

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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