"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

An investigation of linearity and sensitivity of Fiber Bragg Grating sensors

B. A. TAHIR1,* , J. ALI1, R. A. RAHMAN1, A. AHMED2

Affiliation

  1. The Institute of Advanced Photonic Sciences, Faculty of Science, University of Technology Malaysia, 81310 Skudai, Johor, Malaysia
  2. Center of Excellence in Solid State Physics, University of Punjab Lahore, Pakistan

Abstract

In this work, we investigate the linearity and sensitivity of Fiber Bragg Grating (FBG) sensors. A simple experimental setup comprising optical spectrum analyzer, tunable laser source and fiber grating may be utilized to obtain the wavelength shift and strain measurements. The sensing principle is based on tracking of Bragg wavelength shifts due to the change of loading conditions. The experiment was performed on a fiber grating bonded specimen plate made of Zinc. From the experiment, measure the wavelength shift and then axial strain corresponding to the variation of applied load/temperature change. Based on the results, a linear response has been observed between applied train/temperature and Bragg wavelength shift throughout the measured region. It has also been demonstrated that the fiber Bragg grating system is more sensitive for 10cm sensor. The measured sensitivity of 10cm and 15cm sensor is 0.0011nm/μm and 0.0016nm/μm respectively at the same loading conditions. One can also anticipate 0.014nm grating wavelength expansion as a result of temperature change of 1ºC to bare FBG fiber. The experimental results are also showing the capability of the proposed system to perform strain/temperature measurements..

Keywords

Fiber Bragg Gratings (FBG); Linearity of fiber grating; Sensitivity of fiber grating.

Submitted at: Oct. 21, 2009
Accepted at: Nov. 19, 2009

Citation

B. A. TAHIR, J. ALI, R. A. RAHMAN, A. AHMED, An investigation of linearity and sensitivity of Fiber Bragg Grating sensors, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 11, pp. 1692-1695 (2009)