Abstract
Increasing the capacity of an array of sensors is a major challenge in fiber-optic sensing networks. Whereas fiber Bragg grating (FBG) sensors can be discriminated in the spectrum domain, through the popular wavelength-division-multiplexing (WDM) approach, Fabry-Perot interferometry (FPI) sensors have a broad spectrum and are not suitable for WDM. In this paper, a novel approach for the simultaneous detection of multiple FPI sensors is proposed. The key is decoding sensors in the optical cepstrum (spectrum of the optical spectrum) domain, using a Capon estimator. Subsequently, the small cepstrum shifts are accurately detected with a fast-phase correlation method. This approach is labeled cepstrum-division multiplexing (CDM). CDM has been tested on a simulated FPI array, with a coarse wavelength grid typical of most FBG interrogators. Unambiguous and simultaneous detection of 20-39 sensors is achieved, improving over previous methods limited to 1-3 sensors; 0.04-nm accuracy on cavity length estimation has been achieved. A preliminary experimental demonstration has been set up to validate the CDM approach.
| Original language | English |
|---|---|
| Article number | 7482655 |
| Pages (from-to) | 3622-3627 |
| Number of pages | 6 |
| Journal | Journal of Lightwave Technology |
| Volume | 34 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - Aug 1 2016 |
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Keywords
- Capon estimator
- extrinsic Fabry-Perot interferometry (EFPI)
- Fabry-Perot interferometry (FPI)
- fiber optic sensors (FOS)
- optical fiber sensor networks
- sensor detection
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Simultaneous Detection of Multiple Fiber-Optic Fabry-Perot Interferometry Sensors with Cepstrum-Division Multiplexing. / Tosi, Daniele.
In: Journal of Lightwave Technology, Vol. 34, No. 15, 7482655, 01.08.2016, p. 3622-3627.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simultaneous Detection of Multiple Fiber-Optic Fabry-Perot Interferometry Sensors with Cepstrum-Division Multiplexing
AU - Tosi, Daniele
PY - 2016/8/1
Y1 - 2016/8/1
N2 - Increasing the capacity of an array of sensors is a major challenge in fiber-optic sensing networks. Whereas fiber Bragg grating (FBG) sensors can be discriminated in the spectrum domain, through the popular wavelength-division-multiplexing (WDM) approach, Fabry-Perot interferometry (FPI) sensors have a broad spectrum and are not suitable for WDM. In this paper, a novel approach for the simultaneous detection of multiple FPI sensors is proposed. The key is decoding sensors in the optical cepstrum (spectrum of the optical spectrum) domain, using a Capon estimator. Subsequently, the small cepstrum shifts are accurately detected with a fast-phase correlation method. This approach is labeled cepstrum-division multiplexing (CDM). CDM has been tested on a simulated FPI array, with a coarse wavelength grid typical of most FBG interrogators. Unambiguous and simultaneous detection of 20-39 sensors is achieved, improving over previous methods limited to 1-3 sensors; 0.04-nm accuracy on cavity length estimation has been achieved. A preliminary experimental demonstration has been set up to validate the CDM approach.
AB - Increasing the capacity of an array of sensors is a major challenge in fiber-optic sensing networks. Whereas fiber Bragg grating (FBG) sensors can be discriminated in the spectrum domain, through the popular wavelength-division-multiplexing (WDM) approach, Fabry-Perot interferometry (FPI) sensors have a broad spectrum and are not suitable for WDM. In this paper, a novel approach for the simultaneous detection of multiple FPI sensors is proposed. The key is decoding sensors in the optical cepstrum (spectrum of the optical spectrum) domain, using a Capon estimator. Subsequently, the small cepstrum shifts are accurately detected with a fast-phase correlation method. This approach is labeled cepstrum-division multiplexing (CDM). CDM has been tested on a simulated FPI array, with a coarse wavelength grid typical of most FBG interrogators. Unambiguous and simultaneous detection of 20-39 sensors is achieved, improving over previous methods limited to 1-3 sensors; 0.04-nm accuracy on cavity length estimation has been achieved. A preliminary experimental demonstration has been set up to validate the CDM approach.
KW - Capon estimator
KW - extrinsic Fabry-Perot interferometry (EFPI)
KW - Fabry-Perot interferometry (FPI)
KW - fiber optic sensors (FOS)
KW - optical fiber sensor networks
KW - sensor detection
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UR - http://www.scopus.com/inward/citedby.url?scp=84984910894&partnerID=8YFLogxK
U2 - 10.1109/JLT.2016.2575041
DO - 10.1109/JLT.2016.2575041
M3 - Article
VL - 34
SP - 3622
EP - 3627
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
SN - 0733-8724
IS - 15
M1 - 7482655
ER -