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Proceedings Paper

Fiber-optic thermal anemometer based on metallic coated fiber Bragg grating
Author(s): Jia Cheng; Yan Zhou; Xinyong Dong; Wenjun Zhou
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Paper Abstract

A novel thermal anemometer based on a core offset single-mode fiber (SMF) combined with a fiber Bragg grating (FBG) coated with silver film is proposed. Light from a pump laser at 1450 nm propagating down the fiber is coupled by the offset into the fiber cladding. A silver coating was deposited on the fiber surface over the Bragg grating structure to absorb the light. As a result, the dynamic thermal equilibrium would be reached between the laser heating and air flow cooling by monitoring the FBG's wavelength shift. Experimental results reveal that the Bragg wavelength shift is related to the flow velocity and the highest resolution of the thermal anemometer is about 0.05 m/s in the range of 0-17.31 m/s.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84214C (17 October 2012); doi: 10.1117/12.970514
Show Author Affiliations
Jia Cheng, Zhejiang Province Institute of Metrology (China)
Yan Zhou, Zhejiang Province Institute of Metrology (China)
China Jiliang Univ. (China)
Xinyong Dong, China Jiliang Univ. (China)
Wenjun Zhou, China Jiliang Univ. (China)
Carleton Univ. (Canada)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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