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3D-Printed Sensor on a Multicore Fiber for Triple-Parameter Sensing
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DOI：10.1109/JLT.2025.3640582.png)
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Abstract
En 中文
Multi-core fiber (MCF), with a multichannel structure, can serve very effectively as an alternative sensing platform for measuring multiple physical parameters using a single fiber. Femtosecond laser 3D printing technology significantly improves the integration of the devices, due to high processing precision and flexibility it offers. A triple-parameter sensor based on Fabry–Pérot (FP) cavities on a multicore fiber tip was demonstrated. Three different FP cavities were fabricated by femtosecond laser 3D printing on the end faces of the three fiber cores. Temperature, humidity, and pressure were measured using a fluid-infiltrated closed microcavity, an open air-cavity, and a closed hollow cavity, respectively. The sensitivities of these devices were shown to be −182.4 pm/°C, 109 pm/% RH, and 11.24 pm/kPa respectively. This tiny fiber-tip sensor created in this way has the advantages of compact structure, small volume, ease of packaging and low cost. The sensor discussed thus enables monitoring of temperature, humidity, and pressure, and as a device has the potential to be applied in chemical manufacturing and storage, to reduce the risk of leakage and explosion of hazardous chemicals through better in situ monitoring.
Keywords:
Femtosecond laser 3D printing
fiber sensor
FP interferometer
multicore fiber
multiple parameter measurement
Journal
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