Abstract
In this work, partially etched chirped fiber Bragg grating (pECFBG) for the real-time multi-parameter measurement of temperature and refractive index is proposed. The sensor is fabricated by wet-etching a portion of a linearly chirped FBG with linear chirp profile. Obtained CFBG has two active areas: the unetched part of the grating that can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length; the etched part, besides having a similar thermal sensitivity, is exposed to refractive index sensing through the variations of external refractive index. Overall, the pECFBG structure behaves as a compact sensor with multi-parameter capability, that can both measure temperature and refractive index on the same grating, but also spatially resolve temperature detection through the grating section. The results have been validated through both a model and experimental setup, showing that the mutual correlation algorithm applied to different spectral parts of the grating is able to discriminate between uniform and gradient-shaped temperature profiles, and refractive index changes. The reflected spectra showed a clear correlation between the RI change of the surrounding media and spectral shift with temperature variations.
| Original language | English |
|---|---|
| Title of host publication | Optics in Health Care and Biomedical Optics VIII |
| Editors | Ying Gu, Qingming Luo, Xingde Li, Yuguo Tang, Dan Zhu |
| Publisher | SPIE |
| Volume | 10820 |
| ISBN (Electronic) | 9781510622388 |
| DOIs | |
| Publication status | Published - Jan 1 2018 |
| Event | Optics in Health Care and Biomedical Optics VIII 2018 - Beijing, China Duration: Oct 11 2018 → Oct 13 2018 |
Conference
| Conference | Optics in Health Care and Biomedical Optics VIII 2018 |
|---|---|
| Country | China |
| City | Beijing |
| Period | 10/11/18 → 10/13/18 |
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Keywords
- chirped fiber Bragg grating (cFBG)
- etching
- FBG sensors
- fiber optic sensors
- hydrofluoric acid (HF)
- interrogator
- refractive index (RI)
- sensitivity
- temperature pattern
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
An etched chirped fiber Bragg grating for measurement of refractive index and temperature pattern. / Shaimerdenova, M.; Ayupova, T.; Sypabekova, M.; Korganbayev, S.; Bekmurzayeva, A.; Dukenbayev, K.; Molardi, C.; Tosi, D.
Optics in Health Care and Biomedical Optics VIII. ed. / Ying Gu; Qingming Luo; Xingde Li; Yuguo Tang; Dan Zhu. Vol. 10820 SPIE, 2018. 108203B.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - An etched chirped fiber Bragg grating for measurement of refractive index and temperature pattern
AU - Shaimerdenova, M.
AU - Ayupova, T.
AU - Sypabekova, M.
AU - Korganbayev, S.
AU - Bekmurzayeva, A.
AU - Dukenbayev, K.
AU - Molardi, C.
AU - Tosi, D.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - In this work, partially etched chirped fiber Bragg grating (pECFBG) for the real-time multi-parameter measurement of temperature and refractive index is proposed. The sensor is fabricated by wet-etching a portion of a linearly chirped FBG with linear chirp profile. Obtained CFBG has two active areas: the unetched part of the grating that can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length; the etched part, besides having a similar thermal sensitivity, is exposed to refractive index sensing through the variations of external refractive index. Overall, the pECFBG structure behaves as a compact sensor with multi-parameter capability, that can both measure temperature and refractive index on the same grating, but also spatially resolve temperature detection through the grating section. The results have been validated through both a model and experimental setup, showing that the mutual correlation algorithm applied to different spectral parts of the grating is able to discriminate between uniform and gradient-shaped temperature profiles, and refractive index changes. The reflected spectra showed a clear correlation between the RI change of the surrounding media and spectral shift with temperature variations.
AB - In this work, partially etched chirped fiber Bragg grating (pECFBG) for the real-time multi-parameter measurement of temperature and refractive index is proposed. The sensor is fabricated by wet-etching a portion of a linearly chirped FBG with linear chirp profile. Obtained CFBG has two active areas: the unetched part of the grating that can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length; the etched part, besides having a similar thermal sensitivity, is exposed to refractive index sensing through the variations of external refractive index. Overall, the pECFBG structure behaves as a compact sensor with multi-parameter capability, that can both measure temperature and refractive index on the same grating, but also spatially resolve temperature detection through the grating section. The results have been validated through both a model and experimental setup, showing that the mutual correlation algorithm applied to different spectral parts of the grating is able to discriminate between uniform and gradient-shaped temperature profiles, and refractive index changes. The reflected spectra showed a clear correlation between the RI change of the surrounding media and spectral shift with temperature variations.
KW - chirped fiber Bragg grating (cFBG)
KW - etching
KW - FBG sensors
KW - fiber optic sensors
KW - hydrofluoric acid (HF)
KW - interrogator
KW - refractive index (RI)
KW - sensitivity
KW - temperature pattern
UR - http://www.scopus.com/inward/record.url?scp=85057227602&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85057227602&partnerID=8YFLogxK
U2 - 10.1117/12.2502471
DO - 10.1117/12.2502471
M3 - Conference contribution
VL - 10820
BT - Optics in Health Care and Biomedical Optics VIII
A2 - Gu, Ying
A2 - Luo, Qingming
A2 - Li, Xingde
A2 - Tang, Yuguo
A2 - Zhu, Dan
PB - SPIE
ER -