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Enhancement of measurement accuracy in fiber Bragg grating sensors by using a nonlinear least square technique

C. C. CHAN1,* , J. SUN2, N. NI2, Y. TANG2, Y. C. CHU2

Affiliation

  1. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 637457
  2. Division of Bioengineering, School of Chemical and Biomedical Engineering

Abstract

Wavelength detection accuracy in fiber Bragg grating sensors can be increased by use of digital signal processing after photo-detection. Nonlinear least square technique algorithms was implemented and used to improve the Bragg wavelength detection. Simulation and experimental results show that the detection accuracy of the nonlinear least square technique is about 5 times better than the FIR method..

Keywords

Fiber Bragg grating, Wavelength detection, Nonlinear least square.

Submitted at: March 3, 2008
Accepted at: Oct. 7, 2008

Citation

C. C. CHAN, J. SUN, N. NI, Y. TANG, Y. C. CHU, Enhancement of measurement accuracy in fiber Bragg grating sensors by using a nonlinear least square technique, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2569-2573 (2008)