Abstract
Optical feedback induced by a highly reflective fiber Bragg grating (FBG) onto a distributed feedback (DFB) laser is investigated. In static strain conditions, the covariance matrix of the chaotic noise generated by DFB/FBG self-mixing interference is decomposed into its eigenvalues. Then, by observing the eigenvalue pattern, it is possible to detect the strain applied to FBG independently from source power and electrical noise level. Furthermore, by employing a Capon spectral estimator, and splitting and filtering out the self-mixing eigenvalues, it is possible to dynamically detect acoustic signals in harsh signal-to-noise conditions. This technique provides dual static and dynamic FBG interrogation independent on optical power and fiber link losses variations.
| Original language | English |
|---|---|
| Pages (from-to) | 176-181 |
| Number of pages | 6 |
| Journal | Optics and Laser Technology |
| Volume | 50 |
| DOIs | |
| Publication status | Published - 2013 |
| Externally published | Yes |
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Keywords
- FBG sensor
- Fiber Bragg grating (FBG)
- Self-mixing interferometry
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
Cite this
FBG/DFB-induced chaotic self-mixing analysis and sensing applications. / Tosi, Daniele.
In: Optics and Laser Technology, Vol. 50, 2013, p. 176-181.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - FBG/DFB-induced chaotic self-mixing analysis and sensing applications
AU - Tosi, Daniele
PY - 2013
Y1 - 2013
N2 - Optical feedback induced by a highly reflective fiber Bragg grating (FBG) onto a distributed feedback (DFB) laser is investigated. In static strain conditions, the covariance matrix of the chaotic noise generated by DFB/FBG self-mixing interference is decomposed into its eigenvalues. Then, by observing the eigenvalue pattern, it is possible to detect the strain applied to FBG independently from source power and electrical noise level. Furthermore, by employing a Capon spectral estimator, and splitting and filtering out the self-mixing eigenvalues, it is possible to dynamically detect acoustic signals in harsh signal-to-noise conditions. This technique provides dual static and dynamic FBG interrogation independent on optical power and fiber link losses variations.
AB - Optical feedback induced by a highly reflective fiber Bragg grating (FBG) onto a distributed feedback (DFB) laser is investigated. In static strain conditions, the covariance matrix of the chaotic noise generated by DFB/FBG self-mixing interference is decomposed into its eigenvalues. Then, by observing the eigenvalue pattern, it is possible to detect the strain applied to FBG independently from source power and electrical noise level. Furthermore, by employing a Capon spectral estimator, and splitting and filtering out the self-mixing eigenvalues, it is possible to dynamically detect acoustic signals in harsh signal-to-noise conditions. This technique provides dual static and dynamic FBG interrogation independent on optical power and fiber link losses variations.
KW - FBG sensor
KW - Fiber Bragg grating (FBG)
KW - Self-mixing interferometry
UR - http://www.scopus.com/inward/record.url?scp=84876103556&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876103556&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2013.02.020
DO - 10.1016/j.optlastec.2013.02.020
M3 - Article
VL - 50
SP - 176
EP - 181
JO - Optics and Laser Technology
JF - Optics and Laser Technology
SN - 0030-3992
ER -