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

LAN LI1, XINYONG DONG1,* , LIYANG SHAO1, CHUN-LIU ZHAO1, YILING 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.

Citation

LAN LI, XINYONG DONG, LIYANG SHAO, CHUN-LIU ZHAO, YILING SUN, Temperature-independent acceleration measurement with a strain-chirped fiber Bragg grating, Optoelectronics and Advanced Materials - Rapid Communications, 4, 7, July 2010, pp.943-946 (2010).

Submitted at: May 11, 2010

Accepted at: July 14, 2010