TY - JOUR
T1 - KLT-Based Interrogation Technique for FBG Multiplexed Sensor Tracking
AU - Hervás, Javier
AU - Tosi, Daniele
AU - García-Miquel, Héctor
AU - Barrera, David
AU - Fernández-Pousa, Carlos R.
AU - Sales, Salvador
N1 - Funding Information:
This work was supported in part by the Spanish MINECO through Project TEC2014-60378, and in part by the Government of Valencia through the Research Excellency Award Program GVA PROMETEO 2013/012. The work of J. Herv?s was supported by the MECD FPU Scholarship (FPU13/04675).
Publisher Copyright:
© 2016 IEEE.
PY - 2017/8/15
Y1 - 2017/8/15
N2 - The Karhunen-Loeve transform (KLT) is used to retrieve the wavelength information of several fiber Bragg gratings (FBGs) that are acting as a multiplexed sensor. The modulated light of a broadband source is launched to the FBG cascade in order to capture the electrical frequency response of the system. Thanks to dispersive media, the wavelengths of the FBGs are mapped in radio-frequency delays. Wavelength changes are determined by the amplitude change of the samples in the impulse response, a change which is followed by the eigenvalue calculated by the KLT routine. The use of the KLT routine reduces by three orders of magnitude the amount of points needed to have a subdegree resolution in temperature sensing, while keeping the accuracy almost intact.
AB - The Karhunen-Loeve transform (KLT) is used to retrieve the wavelength information of several fiber Bragg gratings (FBGs) that are acting as a multiplexed sensor. The modulated light of a broadband source is launched to the FBG cascade in order to capture the electrical frequency response of the system. Thanks to dispersive media, the wavelengths of the FBGs are mapped in radio-frequency delays. Wavelength changes are determined by the amplitude change of the samples in the impulse response, a change which is followed by the eigenvalue calculated by the KLT routine. The use of the KLT routine reduces by three orders of magnitude the amount of points needed to have a subdegree resolution in temperature sensing, while keeping the accuracy almost intact.
KW - Fiber Bragg gratings
KW - Karhunen-Loeve transform
KW - microwave photonics
KW - optical fiber sensors
UR - http://www.scopus.com/inward/record.url?scp=85027438646&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027438646&partnerID=8YFLogxK
U2 - 10.1109/JLT.2016.2613131
DO - 10.1109/JLT.2016.2613131
M3 - Article
AN - SCOPUS:85027438646
VL - 35
SP - 3387
EP - 3392
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
SN - 0733-8724
IS - 16
ER -