Optimal Design of MPD based fiber optic strain sensors and comparison of power-meter and CCD camera based architectures


Toker O., Efendioglu H. S. , Esen M. E. , Fidanboylu K.

Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, California, United States Of America, 7 - 10 March 2011, vol.7981 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 7981
  • Doi Number: 10.1117/12.880049
  • City: California
  • Country: United States Of America

Abstract

In this work, we consider optimal design of Modal Power Distribution (MPD) based fiber optic sensors and compare power-meter and CCD camera based techniques for strain measurements. To the best of authors' knowledge, majority of the power-meter based MPD sensors use a single photo detector, and there is only one known work where two photo-detectors are used with no optimization on photo-detector locations. Optimal measurement location selection problem and comparison of power-meter and CCD camera based sensor measurements were both addressed in this work. Based on our experimental data, more than 100% increased sensitivity is observed in the newly designed optimal strain sensor. It was also shown that there is a fixed nonlinear relationship between CCD based and power-meter based fiber optic sensor measurements. This allows estimation of power-meter measurements utilizing CCD camera images, which in turn simplifies the optimal detector location selection problem.