Abstract
In this work, a partially etched chirped fiber Bragg grating (pECFBG) is introduced, as a compact sensor for multi-parametric measurement of temperature, thermal gradients over the active length, and refractive index. The sensor is fabricated by wet-etching a portion of a 14-mm linearly chirped FBG with linear chirp profile. The resulting device has two active areas: the unetched part of the grating (2 mm) can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length by means of a spectral reconstruction technique; the etched part (12 mm), besides having a similar thermal sensitivity, is exposed to refractive index sensing through the introduction of a sensitivity to 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.
| Original language | English |
|---|---|
| Pages (from-to) | 18708-18720 |
| Number of pages | 13 |
| Journal | Optics Express |
| Volume | 26 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - Jul 9 2018 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Partially etched chirped fiber bragg grating (pecfbg) for joint temperature, thermal profile, and refractive index detection. / Korganbayev, Sanzhar; Ayupova, Takhmina; Sypabekova, Marzhan; Bekmurzayeva, Aliya; Shaimerdenova, Madina; Dukenbayev, Kanat; Molardi, Carlo; Tosi, Daniele.
In: Optics Express, Vol. 26, No. 14, 09.07.2018, p. 18708-18720.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Partially etched chirped fiber bragg grating (pecfbg) for joint temperature, thermal profile, and refractive index detection
AU - Korganbayev, Sanzhar
AU - Ayupova, Takhmina
AU - Sypabekova, Marzhan
AU - Bekmurzayeva, Aliya
AU - Shaimerdenova, Madina
AU - Dukenbayev, Kanat
AU - Molardi, Carlo
AU - Tosi, Daniele
PY - 2018/7/9
Y1 - 2018/7/9
N2 - In this work, a partially etched chirped fiber Bragg grating (pECFBG) is introduced, as a compact sensor for multi-parametric measurement of temperature, thermal gradients over the active length, and refractive index. The sensor is fabricated by wet-etching a portion of a 14-mm linearly chirped FBG with linear chirp profile. The resulting device has two active areas: the unetched part of the grating (2 mm) can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length by means of a spectral reconstruction technique; the etched part (12 mm), besides having a similar thermal sensitivity, is exposed to refractive index sensing through the introduction of a sensitivity to 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.
AB - In this work, a partially etched chirped fiber Bragg grating (pECFBG) is introduced, as a compact sensor for multi-parametric measurement of temperature, thermal gradients over the active length, and refractive index. The sensor is fabricated by wet-etching a portion of a 14-mm linearly chirped FBG with linear chirp profile. The resulting device has two active areas: the unetched part of the grating (2 mm) can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length by means of a spectral reconstruction technique; the etched part (12 mm), besides having a similar thermal sensitivity, is exposed to refractive index sensing through the introduction of a sensitivity to 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.
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U2 - 10.1364/OE.26.018708
DO - 10.1364/OE.26.018708
M3 - Article
VL - 26
SP - 18708
EP - 18720
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 14
ER -