Structurally-modified tapered optical fiber sensors for long-term detection of liquids

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43933901" target="_blank" >RIV/60461373:22310/19:43933901 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/19:00325666
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S106852001830470X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S106852001830470X?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.yofte.2018.11.010" target="_blank" >10.1016/j.yofte.2018.11.010</a>

Result language
angličtina
Original language name
Structurally-modified tapered optical fiber sensors for long-term detection of liquids
Original language description
We present an improvement of tapered optical fiber (TOF) sensor's response for the detection of liquids, which is achieved by TOF surface structural modification. Our TOF sensors utilize the refractometric principle with enhanced evanescent-wave overlap due to the wavelength of 1550 nm and TOF waist diameters of 4-6 mu m. The structural modification is achieved by long-term TOF exposition to hygroscopic liquid analytes and ambient atmosphere. To analyze the structural modification process, long-term as well as proof-of-principle tests have been carried out to evaluate TOF sensors stability in terms of sensitivity and resolution. Maximum sensitivity of over 2100 dB/RIU has been reached when TOF is used to detect a liquid analyte with refractive index of 1.415. Increase of more than 1400 dB/RIU is attributed to the enhanced sensitivity. Sample TOF sensors were then linearly calibrated and have been tested in more than one year-long continuous measurement campaign. Resolution better than 7.10(-4) for a refractive index range of from 1.405 to 1.425 with working point drift below 2.10(-4) over 12 months period has been achieved. Our results and observations are suitable for reliable, low-cost and application-tailored TOF sensor development.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20200 - Electrical engineering, Electronic engineering, Information engineering

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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