You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
30 May 2016FBGs cascade interrogation technique based on wavelength-to-delay mapping and KLT analysis
The Karhunen-Loeve transform is applied to the coarsely sampled impulse response generated by an FBG cascade in order to calculate the temperature change suffered by the FBGs. Thanks to a dispersive media, the wavelength change performed by the temperature change produces a delay shift in the sample generated by an FBG, delay shift which is recorded in the eigenvalues calculated by the KLT routine, letting to measure the temperature variation. Although the FBGs samples are represented only by four points, a continuous temperature measurement can be performed thanks to the KLT algorithm. This means a three order reduction in the number of points giving this method a low computational complexity. Simulations are performed to validate the interrogation technique and estimate performance and an experimental example is provided to demonstrate real operation.
The alert did not successfully save. Please try again later.
J. Hervás, D. Barrera, Carlos R. Fernández-Pousa, S. Sales, "FBGs cascade interrogation technique based on wavelength-to-delay mapping and KLT analysis," Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991628 (30 May 2016); https://doi.org/10.1117/12.2236903