We propose a fiber Bragg grating laser sensor system for possible uses in large scale wind turbine blades’ condition monitoring. The measurement instability due to the sensitive multi-wavelength lasing has been greatly improved by employing a polarization scrambling in the lasing cavity and a spectrometer demodulator. With suggested technique, we obtained 100% of data acquisition rate from all the 4 FBG laser sensors along single fiber-optic cable. Also the noise characteristics of the sensor outputs have improved 4 times more than the previous system.

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579Z (2 June 2014); doi: 10.1117/12.2059480

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)