Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 29, Issue 18, Pages 1544-1547Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2017.2723624
Keywords
Graphene quantum dots (GQDs); hollow core optical fibers; temperature sensor
Funding
- National Natural Science Foundation of China [61425003, 61403074]
- Fundamental Research Funds for the Central Universities [N160408001, N150401001]
- State Key Laboratory of Synthetical Automation for Process Industries [2013ZCX09]
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Graphene quantum dots (GQDs), a smart functional nano-sensing material, present excellent thermo-optic properties. Here a novel fiber-optic temperature sensor based on GQDs solution encapsulated in hollow core fiber (HCF) is first proposed. GQDs with the small size less than 20 nm are successfully filled in the inner part of HCF by capillarity, and the compact sensing probe is length of 6 mm. The relationships of the photoluminescence (PL) peak, intensity, and full-width at half-maximum of the PL spectra are investigated with temperature changing from 10 degrees C to 80 degrees C. The photoluminescence peak wavelength and the self-referenced intensity all present good sensitivities, which are 123.7 pm/degrees C and -0.01375/degrees C, respectively.
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