AI Article Synopsis
- - The paper presents an innovative in-fiber Fabry-Perot temperature sensor that utilizes an Indium gallium stannum (InGaSn) alloy, offering high sensitivity to temperature changes.
- - This sensor forms a cavity by splicing single-mode fibers with hollow-core fibers of different diameters, allowing it to effectively convert small temperature variations into measurable spectral shifts.
- - Experimental results indicate the sensor has a temperature sensitivity of 11.3 nm/°C between 30-40°C, significantly outperforming existing extrinsic FPIs, with potential applications in vitro cell culture and biopharmaceutical monitoring.
Article Abstract
In this paper, we proposed an in-fiber Fabry-Perot temperature sensor which filled with Indium gallium stannum (InGaSn) alloy. By splicing a single-mode fiber axially with hollow-core fibers (HCFs) of varying inner diameters, a cavity of the Fabry-Perot interferometer (FPI) structure is formed. Assisted by liquid metal with fluidity and high thermal expansivity, subtle temperature fluctuations are converted into variations in the interferometric cavity length which leads to a significant spectral drift. Experimental result shows that the temperature sensitivity for the proposed sensor reaches 11.3 nm/°C in the range of 30-40°C, which is almost an order of magnitude higher than that of other extrinsic FPIs. Such high sensitivity within this temperature range makes the sensor potentially applicable in temperature monitoring in the vitro cell culture and biopharmaceutical fields. Additionally, influences caused by the inner diameter of HCFs and the amount of liquid metal filled in structure are also considered in this work.
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| http://dx.doi.org/10.1364/OE.531599 | DOI Listing |
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