Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6023
Title: All-optical fiber anemometer based on laser heated fiber Bragg gratings
Authors: Gao, S
Zhang, AP
Tam, HY 
Cho, LH
Lu, C 
Keywords: Anemometers
Cobalt
Fiber optic components
Fiber optic sensors
Laser heating
Meteorological instruments
Optical fiber fabrication
Pumping (laser)
Speed regulators
Wind effects
Issue Date: 23-May-2011
Publisher: Optical Society of America
Source: Optics express, 23 May 2011, v. 19, no. 11, p. 10124-10130 How to cite?
Journal: Optics express 
Abstract: A fiber-optic anemometer based on fiber Bragg gratings (FBGs) is presented. A short section of cobalt-doped fiber was utilized to make a fiber-based “hot wire” for wind speed measurement. Fiber Bragg gratings (FBGs) were fabricated in the cobalt-doped fiber using 193 nm laser pulses to serve as localized temperature sensors. A miniature all-optical fiber anemometer is constructed by using two FBGs to determine the dynamic thermal equilibrium between the laser heating and air flow cooling through monitoring the FBGs’ central wavelengths. It was demonstrated that the sensitivity of the sensor can be adjusted through the power of pump laser or the coating on the FBG. Experimental results reveal that the proposed FBG-based anemometer exhibits very good performance for wind speed measurement. The resolution of the FBG-based anemometer is about 0.012 m/s for wind speed range between 2.0 m/s and 8.0 m/s.
URI: http://hdl.handle.net/10397/6023
ISSN: 1094-4087 (eISSN)
DOI: 10.1364/OE.19.010124
Rights: ©2011 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.19.010124. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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