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
  • Bursa Uludag University Affiliated: No


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.