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A novel strain and position sensor based on a linearly chirped fiber Bragg grating

D. LIU1,1,* , H. LIU1

Affiliation

  1. School of Optoelectronics Science and Engineering, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China

Abstract

We propose and experimentally demonstrate a position sensor system based on a thermally-induced linearly chirped fiber Bragg grating (LCFBG). Eight NiCr resistance wires are used to heat the LCFBG at eight small points to generate multiple narrowband transmission peaks within the stopband of the transmission-mode LCFBG. By monitoring the wavelength shift of the thermally-induced transmission peaks, strain information can be extracted. This sensor system provides the unique advantages of compact structure, cost-effective, able to demodulate both the strain and position information with only one sensor element.

Keywords

Fiber Bragg grating, Chirped, Sensor, Strain.

Citation

D. LIU, H. LIU, A novel strain and position sensor based on a linearly chirped fiber Bragg grating, Optoelectronics and Advanced Materials - Rapid Communications, 4, 6, June 2010, pp.795-798 (2010).

Submitted at: March 21, 2010

Accepted at: June 16, 2010