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Temperature-independent acceleration measurement with a strain-chirped fiber Bragg grating

L. LI1,* , X. DONG1, L. SHAO1, C.-L. ZHAO1, Y. SUN1

Affiliation

  1. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China, 310018

Abstract

A novel fiber optic accelerometer is proposed and demonstrated. The sensing mechanism is based on the measurement of bandwidth and optical power of a strain-chirped fiber Bragg grating (FBG). Experimental results show that 3-dB bandwidth and reflected optical power of the strain-chirped FBG responds to acceleration sensitively. The achieved sensitivities are up to 0.4 nm/g and 4.57 μW/g respectively in the linear range. Furthermore, this sensor is very cost-effective and inherently insensitive to temperature due to the simple demodulation method..

Keywords

Fiber Bragg grating (FBG), Accelerometer, Simply-supported beam, Temperature insensitive.

Submitted at: June 13, 2010
Accepted at: Aug. 12, 2010

Citation

L. LI, X. DONG, L. SHAO, C.-L. ZHAO, Y. SUN, Temperature-independent acceleration measurement with a strain-chirped fiber Bragg grating, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 8, pp. 1666-1669 (2010)