Abstract
In this paper, a new sensor system for simultaneous and independent multipoint strain and temperature measurements is presented. The interrogation of the sensing heads has been carried out by monitoring their fast Fourier transform phase variations. In particular, two of each microstructured optical fiber cavity interference frequencies were used for the measures. This method is independent of the signal amplitude and also avoids the necessity of tracking the wavelength evolution in the spectrum, which can be a handicap when there are multiple interference frequency components with different sensitivities. The sensing heads present birefringent and multimodal properties, and therefore, both characteristics lead to their own interference with different properties and sensitivities. The multiplexing capability of the sensing heads and the interrogator method has also been tested and validated. Sensors were operated within a range of temperature 30 °C–80 °C and a deformation of ∼450 με was applied. Crosstalk between measurements can be corrected through simple math operations leading to independent and crosstalk-free multipoint and multiparameter sensors.
© 2017 IEEE
PDF Article
More Like This
Temperature-insensitive polarimetric vibration sensor based on HiBi microstructured optical fiber
Karima Chah, Nicolas Linze, Christophe Caucheteur, Patrice Mégret, Pierre Tihon, Olivier Verlinden, Sanne Sulejmani, Thomas Geernaert, Francis Berghmans, Hugo Thienpont, and Marc Wuilpart
Appl. Opt. 51(25) 6130-6138 (2012)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription