Reflection-mode fiber-optic temperature sensing probe based on quantum dots filled micro-cavity

Qi Zhang; Jincheng Lei; Liwei Hua; Yongji Wu; Xuran Zhu; Hai Xiao

doi:10.1117/12.2545291

20 February 2020 Reflection-mode fiber-optic temperature sensing probe based on quantum dots filled micro-cavity

Qi Zhang, Jincheng Lei, Liwei Hua, Yongji Wu, Xuran Zhu, Hai Xiao

Proceedings Volume 11233, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX; 112331F (2020) https://doi.org/10.1117/12.2545291
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

We report a prototype reflection-mode fiber optic probe based on quantum dots filled micro-cavity. The probe was fabricated by sealing quantum dots liquid or coating inside a glass capillary pigtailed with a multimode optical fiber. And the probe was tested for in situ measurement of temperature change. By analyzing the back-reflected fluorescence signals generated from the quantum dots, the localized temperature of the microcavity structure could be correlated. The sensitivities based on fluorescence peak wavelength and full-width at half-maximum (FWHM) were calculated for both sensors in the biologically meaningful temperature range of 33.0-42.0C. This proposed reflection-mode trumpet-shape micro-cavity probe is attractive for chemical and biological sensing because it is cost-effective, simple to fabricate, mechanically robust and miniaturized in size.

Citation Download Citation

Qi Zhang, Jincheng Lei, Liwei Hua, Yongji Wu, Xuran Zhu, and Hai Xiao "Reflection-mode fiber-optic temperature sensing probe based on quantum dots filled micro-cavity", Proc. SPIE 11233, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX, 112331F (20 February 2020); https://doi.org/10.1117/12.2545291

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KEYWORDS

Luminescence

Quantum dots

Temperature metrology

Fiber optics sensors

Liquids

Sensors

Coating

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