Stabilization of fiber Bragg grating laser sensor with polarization scrambling

Hyunjin Kim; Dae-gil Kim; Minho Song

doi:10.1117/12.2059480

2 June 2014 Stabilization of fiber Bragg grating laser sensor with polarization scrambling

Hyunjin Kim, Dae-gil Kim, Minho Song

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91579Z (2014) https://doi.org/10.1117/12.2059480
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

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.

Citation Download Citation

Hyunjin Kim, Dae-gil Kim, and Minho Song "Stabilization of fiber Bragg grating laser sensor with polarization scrambling", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579Z (2 June 2014); https://doi.org/10.1117/12.2059480

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