Zhiqi Lu, Ruimin Dong, Changning Liu. Temperature and Humidity Sensor Based on Tapered Thin‑Core Fiber Coated with Graphene Quantum Dots‑Polyvinyl Alcohol[J]. Chinese Journal of Lasers, 2023, 50(1): 0113020
- Chinese Journal of Lasers
- Vol. 50, Issue 1, 0113020 (2023)
Fig. 1. Sensing structure. (a) Structure schematic of sensor; (b) sensing structure under microscope;(c) graphene quantum dots (GQDs) under scanning electron microscope
Fig. 2. Initial transmission spectra of thin-core fiber. (a) Before tapering; (b) after tapering
Fig. 3. Spectral lines of sensor after coating with graphene quantum dots-polyvinyl alcohol (GQDs-PVA). (a) Initial transmission spectrum; (b) spectral analysis
Fig. 4. Schematic of temperature and humidity experimental apparatus
Fig. 5. Temperature experimental results of sensor before and after tapering. (a) Temperature drift before tapering; (b) temperature fitting before tapering; (c) temperature drift after tapering; (d) temperature fitting after tapering
Fig. 6. Temperature experimental results of sensor after coating GQDs-PVA. (a) Temperature drift; (b) temperature fitting
Fig. 7. Temperature stability of sensor after coating GQDs-PVA
Fig. 8. Humidity experimental results of sensor after coating GQDs-PVA. (a) Relative humidity drift; (b) relative humidity fitting
Fig. 9. Humidity stability of sensor after coating GQDs-PVA
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