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Photothermal anemometer based on carbon nanotube-coated highly tilted fiber Bragg grating-assisted SPR sensor
Author(s): Yuke Liu; Binghao Liang; Xuejun Zhang; Nan Hu; Kaiwei Li; Francesco Baldini; Xuchun Gui; Francesco Chiavaioli; Tuan Guo
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Paper Abstract

An ultra-sensitive plasmonic fiber-optic photothermal anemometer is proposed and demonstrated. The device consists of a highly-tilted fiber Bragg grating (TFBG) sensor, which is coated with a gold layer exciting surface plasmon resonance (SPR) and then carbon nanotubes as the photothermal conversion element. The carbon nanotubes deposited on the sensor surface efficiently convert light from the heating laser, which is wavelength matched to the SPR signature, into heat. Air flow draws away the surface heat, thus inducing both a strong SPR wavelength shift and a changed of the power modulation. Using this approach, the proposed anemometer accounts for a dynamic range from 0.05 m/s to 0.65 m/s for wind speed measurement. In addition, the real-time monitoring of wind speed has been proved by measuring the intensity of the heating laser source. This device is a valuable candidate for a wide range of potential applications in both scientific research and industrial production, given its simplicity and robustness in structure.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 1119918 (28 August 2019); doi: 10.1117/12.2540040
Show Author Affiliations
Yuke Liu, Jinan Univ. (China)
Binghao Liang, Sun Yat-Sen Univ. (China)
Xuejun Zhang, Jinan Univ. (China)
Nan Hu, Jinan Univ. (China)
Kaiwei Li, Jinan Univ. (China)
Francesco Baldini, Istituto di Fisica Applicata "Nello Carrara" (Italy)
Xuchun Gui, Sun Yat-Sen Univ. (China)
Francesco Chiavaioli, Istituto di Fisica Applicata "Nello Carrara" (Italy)
Tuan Guo, Jinan Univ. (China)


Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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