Abstract
The Karhunen-Loeve Transform (KLT) is applied to accurate detection of optical fiber sensors in the spectral domain. By processing an optical spectrum, although coarsely sampled, through the KLT, and subsequently processing the obtained eigenvalues, it is possible to decode a plurality of optical sensor results. The KLT returns higher accuracy than other demodulation techniques, despite coarse sampling, and exhibits higher resilience to noise. Three case studies of KLT-based processing are presented, representing most of the current challenges in optical fiber sensing: (1) demodulation of individual sensors, such as Fiber Bragg Gratings (FBGs) and Fabry-Perot Interferometers (FPIs); (2) demodulation of dual (FBG/FPI) sensors; (3) application of reverse KLT to isolate different sensors operating on the same spectrum. A simulative outline is provided to demonstrate the KLT operation and estimate performance; a brief experimental section is also provided to validate accurate FBG and FPI decoding.
| Original language | English |
|---|---|
| Pages (from-to) | 27470-27492 |
| Number of pages | 23 |
| Journal | Sensors (Switzerland) |
| Volume | 15 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Oct 29 2015 |
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Keywords
- Fabry-Perot interferometry (FPI)
- Fiber Bragg grating (FBG)
- Karhunen-loeve transform (KLT)
- Optical fiber sensors (OFS)
- Optical sensor demodulation
- Optical signal processing
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Analytical Chemistry
- Biochemistry
Cite this
Advanced interrogation of fiber-optic bragg grating and fabry-perot sensors with KLT analysis. / Tosi, Daniele.
In: Sensors (Switzerland), Vol. 15, No. 11, 29.10.2015, p. 27470-27492.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Advanced interrogation of fiber-optic bragg grating and fabry-perot sensors with KLT analysis
AU - Tosi, Daniele
PY - 2015/10/29
Y1 - 2015/10/29
N2 - The Karhunen-Loeve Transform (KLT) is applied to accurate detection of optical fiber sensors in the spectral domain. By processing an optical spectrum, although coarsely sampled, through the KLT, and subsequently processing the obtained eigenvalues, it is possible to decode a plurality of optical sensor results. The KLT returns higher accuracy than other demodulation techniques, despite coarse sampling, and exhibits higher resilience to noise. Three case studies of KLT-based processing are presented, representing most of the current challenges in optical fiber sensing: (1) demodulation of individual sensors, such as Fiber Bragg Gratings (FBGs) and Fabry-Perot Interferometers (FPIs); (2) demodulation of dual (FBG/FPI) sensors; (3) application of reverse KLT to isolate different sensors operating on the same spectrum. A simulative outline is provided to demonstrate the KLT operation and estimate performance; a brief experimental section is also provided to validate accurate FBG and FPI decoding.
AB - The Karhunen-Loeve Transform (KLT) is applied to accurate detection of optical fiber sensors in the spectral domain. By processing an optical spectrum, although coarsely sampled, through the KLT, and subsequently processing the obtained eigenvalues, it is possible to decode a plurality of optical sensor results. The KLT returns higher accuracy than other demodulation techniques, despite coarse sampling, and exhibits higher resilience to noise. Three case studies of KLT-based processing are presented, representing most of the current challenges in optical fiber sensing: (1) demodulation of individual sensors, such as Fiber Bragg Gratings (FBGs) and Fabry-Perot Interferometers (FPIs); (2) demodulation of dual (FBG/FPI) sensors; (3) application of reverse KLT to isolate different sensors operating on the same spectrum. A simulative outline is provided to demonstrate the KLT operation and estimate performance; a brief experimental section is also provided to validate accurate FBG and FPI decoding.
KW - Fabry-Perot interferometry (FPI)
KW - Fiber Bragg grating (FBG)
KW - Karhunen-loeve transform (KLT)
KW - Optical fiber sensors (OFS)
KW - Optical sensor demodulation
KW - Optical signal processing
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U2 - 10.3390/s151127470
DO - 10.3390/s151127470
M3 - Article
VL - 15
SP - 27470
EP - 27492
JO - Sensors
JF - Sensors
SN - 1424-3210
IS - 11
ER -