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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 11 — May. 23, 2011
  • pp: 10124–10130

All-optical fiber anemometer based on laser heated fiber Bragg gratings

Shaorui Gao, A. Ping Zhang, Hwa-Yaw Tam, L. H. Cho, and Chao Lu  »View Author Affiliations

Optics Express, Vol. 19, Issue 11, pp. 10124-10130 (2011)

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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.

© 2011 OSA

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 14, 2011
Revised Manuscript: May 6, 2011
Manuscript Accepted: May 6, 2011
Published: May 11, 2011

Shaorui Gao, A. Ping Zhang, Hwa-Yaw Tam, L. H. Cho, and Chao Lu, "All-optical fiber anemometer based on laser heated fiber Bragg gratings," Opt. Express 19, 10124-10130 (2011)

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